feat: use buffered IO to enable streaming responses, and implement flush component (#802)

.version

@@ -1 +1 @@
-0.2.726
+0.2.728

benchmarks/templ/template_templ.go

@@ -10,8 +10,15 @@ import templruntime "github.com/a-h/templ/runtime"
 func Render(p Person) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -100,9 +107,6 @@ func Render(p Person) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

cmd/templ/fmtcmd/main.go

@@ -10,7 +10,7 @@ import (
 	"sync"
 	"time"
 
-	imports "github.com/a-h/templ/cmd/templ/import"
+	"github.com/a-h/templ/cmd/templ/imports"
 	"github.com/a-h/templ/cmd/templ/processor"
 	parser "github.com/a-h/templ/parser/v2"
 	"github.com/natefinch/atomic"

cmd/templ/generatecmd/testwatch/testdata/templates_templ.go

@@ -12,8 +12,15 @@ import "fmt"
 func Page(count int) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -37,9 +44,6 @@ func Page(count int) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

cmd/templ/imports/process.go

@@ -6,14 +6,15 @@ import (
 	"go/ast"
 	"go/format"
 	"go/token"
-	"log"
 	"path"
 	"slices"
+	"strconv"
 	"strings"
 
 	goparser "go/parser"
 
 	"golang.org/x/sync/errgroup"
+	"golang.org/x/tools/go/ast/astutil"
 	"golang.org/x/tools/imports"
 
 	"github.com/a-h/templ/generator"
@@ -88,47 +89,45 @@ func Process(t parser.TemplateFile) (parser.TemplateFile, error) {
 		return nil
 	})
 
-	var gofile *ast.File
+	var firstGoNodeInTemplate *ast.File
 	// Update the template with the imports.
 	// Ensure that there is a Go expression to add the imports to as the first node.
 	eg.Go(func() (err error) {
-		gofile, err = goparser.ParseFile(fset, fileName, t.Package.Expression.Value+"\n"+importsNode.Expression.Value, goparser.AllErrors)
+		firstGoNodeInTemplate, err = goparser.ParseFile(fset, fileName, t.Package.Expression.Value+"\n"+importsNode.Expression.Value, goparser.AllErrors|goparser.ParseComments)
 		if err != nil {
-			log.Printf("failed to parse go code: %v", importsNode.Expression.Value)
 			return fmt.Errorf("failed to parse imports section: %w", err)
 		}
 		return nil
 	})
+
+	// Wait for completion of both parts.
 	if err := eg.Wait(); err != nil {
 		return t, err
 	}
-	slices.SortFunc(updatedImports, func(a, b *ast.ImportSpec) int {
-		return strings.Compare(a.Path.Value, b.Path.Value)
-	})
-	newImportDecl := &ast.GenDecl{
-		Tok:   token.IMPORT,
-		Specs: convertSlice(updatedImports),
-	}
+
 	// Delete all the existing imports.
-	var indicesToDelete []int
-	for i, decl := range gofile.Decls {
-		if decl, ok := decl.(*ast.GenDecl); ok && decl.Tok == token.IMPORT {
-			indicesToDelete = append(indicesToDelete, i)
+	for _, imp := range firstGoNodeInTemplate.Imports {
+		name, path, err := getImportDetails(imp)
+		if err != nil {
+			return t, err
 		}
+		astutil.DeleteNamedImport(fset, firstGoNodeInTemplate, name, path)
 	}
-	for i := len(indicesToDelete) - 1; i >= 0; i-- {
-		gofile.Decls = append(gofile.Decls[:indicesToDelete[i]], gofile.Decls[indicesToDelete[i]+1:]...)
-	}
-	if len(updatedImports) > 0 {
-		gofile.Imports = updatedImports
-		gofile.Decls = append([]ast.Decl{newImportDecl}, gofile.Decls...)
+	// Add imports, if there are any to add.
+	for _, imp := range updatedImports {
+		name, path, err := getImportDetails(imp)
+		if err != nil {
+			return t, err
+		}
+		astutil.AddNamedImport(fset, firstGoNodeInTemplate, name, path)
 	}
 	// Write out the Go code with the imports.
 	updatedGoCode := new(strings.Builder)
-	err := format.Node(updatedGoCode, fset, gofile)
+	err := format.Node(updatedGoCode, fset, firstGoNodeInTemplate)
 	if err != nil {
 		return t, fmt.Errorf("failed to write updated go code: %w", err)
 	}
+	// Remove the package statement from the node, by cutting the first line of the file.
 	importsNode.Expression.Value = strings.TrimSpace(strings.SplitN(updatedGoCode.String(), "\n", 2)[1])
 	if len(updatedImports) == 0 && importsNode.Expression.Value == "" {
 		t.Nodes = t.Nodes[1:]
@@ -138,10 +137,16 @@ func Process(t parser.TemplateFile) (parser.TemplateFile, error) {
 	return t, nil
 }
 
-func convertSlice(slice []*ast.ImportSpec) []ast.Spec {
-	result := make([]ast.Spec, len(slice))
-	for i, v := range slice {
-		result[i] = ast.Spec(v)
+func getImportDetails(imp *ast.ImportSpec) (name, path string, err error) {
+	if imp.Name != nil {
+		name = imp.Name.Name
 	}
-	return result
+	if imp.Path != nil {
+		path, err = strconv.Unquote(imp.Path.Value)
+		if err != nil {
+			err = fmt.Errorf("failed to unquote package path %s: %w", imp.Path.Value, err)
+			return
+		}
+	}
+	return name, path, nil
 }

cmd/templ/imports/testdata/comments.txtar

@@ -0,0 +1,12 @@
+-- fmt_templ.templ --
+package test
+
+// Comment on variable or function.
+var x = fmt.Sprintf("Hello")
+-- fmt_templ.templ --
+package test
+
+import "fmt"
+
+// Comment on variable or function.
+var x = fmt.Sprintf("Hello")

cmd/templ/imports/testdata/extraspace.txtar

@@ -0,0 +1,15 @@
+-- fmt_templ.templ --
+package test
+
+const x = 123
+
+
+var x = fmt.Sprintf("Hello")
+-- fmt_templ.templ --
+package test
+
+import "fmt"
+
+const x = 123
+
+var x = fmt.Sprintf("Hello")

cmd/templ/imports/testdata/namedimportsadd.txtar

@@ -0,0 +1,19 @@
+-- fmt_templ.templ --
+package test
+
+import (
+  sconv "strconv"
+)
+
+// Comment on variable or function.
+var x = fmt.Sprintf(sconv.Quote("Hello"))
+-- fmt_templ.templ --
+package test
+
+import (
+	"fmt"
+	sconv "strconv"
+)
+
+// Comment on variable or function.
+var x = fmt.Sprintf(sconv.Quote("Hello"))

cmd/templ/imports/testdata/namedimportsremoved.txtar

@@ -0,0 +1,16 @@
+-- fmt_templ.templ --
+package test
+
+import (
+  sconv "strconv"
+)
+
+// Comment on variable or function.
+var x = fmt.Sprintf("Hello")
+-- fmt_templ.templ --
+package test
+
+import "fmt"
+
+// Comment on variable or function.
+var x = fmt.Sprintf("Hello")

cmd/templ/imports/testdata/noimportscode.txtar

@@ -0,0 +1,20 @@
+-- fmt.templ --
+package test
+
+func test() {
+  // Do nothing.
+}
+
+templ Hello() {
+	<div>Hello</div>
+}
+-- fmt.templ --
+package test
+
+func test() {
+	// Do nothing.
+}
+
+templ Hello() {
+	<div>Hello</div>
+}

cmd/templ/lspcmd/httpdebug/list_templ.go

@@ -10,8 +10,15 @@ import templruntime "github.com/a-h/templ/runtime"
 func list(uris []string) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -81,9 +88,6 @@ func list(uris []string) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

cmd/templ/lspcmd/proxy/server.go

@@ -9,7 +9,7 @@ import (
 	"github.com/a-h/parse"
 	lsp "github.com/a-h/protocol"
 	"github.com/a-h/templ"
-	imports "github.com/a-h/templ/cmd/templ/import"
+	"github.com/a-h/templ/cmd/templ/imports"
 	"github.com/a-h/templ/generator"
 	"github.com/a-h/templ/parser/v2"
 	"go.lsp.dev/uri"

cmd/templ/testproject/testdata/templates_templ.go

@@ -12,8 +12,15 @@ import "fmt"
 func Page(count int) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -37,9 +44,6 @@ func Page(count int) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

cmd/templ/visualize/sourcemapvisualisation_templ.go

@@ -8,8 +8,7 @@ import "github.com/a-h/templ"
 import templruntime "github.com/a-h/templ/runtime"
 
 func row() templ.CSSClass {
-	templ_7745c5c3_CSSBuilder, _, templ_7745c5c3_release := templruntime.WriterToBuffer(nil)
-	defer templ_7745c5c3_release()
+	templ_7745c5c3_CSSBuilder := templruntime.GetBuilder()
 	templ_7745c5c3_CSSBuilder.WriteString(`display:flex;`)
 	templ_7745c5c3_CSSID := templ.CSSID(`row`, templ_7745c5c3_CSSBuilder.String())
 	return templ.ComponentCSSClass{
@@ -19,8 +18,7 @@ func row() templ.CSSClass {
 }
 
 func column() templ.CSSClass {
-	templ_7745c5c3_CSSBuilder, _, templ_7745c5c3_release := templruntime.WriterToBuffer(nil)
-	defer templ_7745c5c3_release()
+	templ_7745c5c3_CSSBuilder := templruntime.GetBuilder()
 	templ_7745c5c3_CSSBuilder.WriteString(`flex:50%;`)
 	templ_7745c5c3_CSSBuilder.WriteString(`overflow-y:scroll;`)
 	templ_7745c5c3_CSSBuilder.WriteString(`max-height:100vh;`)
@@ -32,8 +30,7 @@ func column() templ.CSSClass {
 }
 
 func code() templ.CSSClass {
-	templ_7745c5c3_CSSBuilder, _, templ_7745c5c3_release := templruntime.WriterToBuffer(nil)
-	defer templ_7745c5c3_release()
+	templ_7745c5c3_CSSBuilder := templruntime.GetBuilder()
 	templ_7745c5c3_CSSBuilder.WriteString(`font-family:monospace;`)
 	templ_7745c5c3_CSSID := templ.CSSID(`code`, templ_7745c5c3_CSSBuilder.String())
 	return templ.ComponentCSSClass{
@@ -45,8 +42,15 @@ func code() templ.CSSClass {
 func combine(templFileName string, left, right templ.Component) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -165,9 +169,6 @@ func combine(templFileName string, left, right templ.Component) templ.Component
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
@@ -209,8 +210,15 @@ func removeHighlight(sourceId, targetId string) templ.ComponentScript {
 func mappedCharacter(s string, sourceID, targetID string) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var10 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var10 == nil {
@@ -274,9 +282,6 @@ func mappedCharacter(s string, sourceID, targetID string) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

examples/blog/posts_templ.go

@@ -15,8 +15,15 @@ import (
 func headerTemplate(name string) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -40,9 +47,6 @@ func headerTemplate(name string) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
@@ -50,8 +54,15 @@ func headerTemplate(name string) templ.Component {
 func footerTemplate() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var3 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var3 == nil {
@@ -75,9 +86,6 @@ func footerTemplate() templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
@@ -85,8 +93,15 @@ func footerTemplate() templ.Component {
 func navTemplate() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var5 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var5 == nil {
@@ -97,9 +112,6 @@ func navTemplate() templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
@@ -107,8 +119,15 @@ func navTemplate() templ.Component {
 func layout(name string) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var6 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var6 == nil {
@@ -160,9 +179,6 @@ func layout(name string) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
@@ -170,8 +186,15 @@ func layout(name string) templ.Component {
 func postsTemplate(posts []Post) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var8 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var8 == nil {
@@ -218,9 +241,6 @@ func postsTemplate(posts []Post) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
@@ -228,8 +248,15 @@ func postsTemplate(posts []Post) templ.Component {
 func home() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var11 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var11 == nil {
@@ -238,25 +265,26 @@ func home() templ.Component {
 		ctx = templ.ClearChildren(ctx)
 		templ_7745c5c3_Var12 := templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 			templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-			templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-			defer templ_7745c5c3_Release()
+			templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+			if !templ_7745c5c3_IsBuffer {
+				defer func() {
+					templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+					if templ_7745c5c3_Err == nil {
+						templ_7745c5c3_Err = templ_7745c5c3_BufErr
+					}
+				}()
+			}
 			ctx = templ.InitializeContext(ctx)
 			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString("<div data-testid=\"homeTemplate\">Welcome to my website.</div>")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
-			if !templ_7745c5c3_IsBuffer {
-				_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-			}
 			return templ_7745c5c3_Err
 		})
 		templ_7745c5c3_Err = layout("Home").Render(templ.WithChildren(ctx, templ_7745c5c3_Var12), templ_7745c5c3_Buffer)
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
@@ -264,8 +292,15 @@ func home() templ.Component {
 func posts(posts []Post) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var13 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var13 == nil {
@@ -274,25 +309,26 @@ func posts(posts []Post) templ.Component {
 		ctx = templ.ClearChildren(ctx)
 		templ_7745c5c3_Var14 := templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 			templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-			templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-			defer templ_7745c5c3_Release()
+			templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+			if !templ_7745c5c3_IsBuffer {
+				defer func() {
+					templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+					if templ_7745c5c3_Err == nil {
+						templ_7745c5c3_Err = templ_7745c5c3_BufErr
+					}
+				}()
+			}
 			ctx = templ.InitializeContext(ctx)
 			templ_7745c5c3_Err = postsTemplate(posts).Render(ctx, templ_7745c5c3_Buffer)
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
-			if !templ_7745c5c3_IsBuffer {
-				_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-			}
 			return templ_7745c5c3_Err
 		})
 		templ_7745c5c3_Err = layout("Posts").Render(templ.WithChildren(ctx, templ_7745c5c3_Var14), templ_7745c5c3_Buffer)
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

examples/content-security-policy/templates_templ.go

@@ -20,8 +20,15 @@ func sayHello() templ.ComponentScript {
 func template() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -32,9 +39,6 @@ func template() templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

examples/counter-basic/components_templ.go

@@ -12,8 +12,15 @@ import "strconv"
 func counts(global, user int) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -50,9 +57,6 @@ func counts(global, user int) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
@@ -60,8 +64,15 @@ func counts(global, user int) templ.Component {
 func form() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var4 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var4 == nil {
@@ -72,9 +83,6 @@ func form() templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
@@ -82,8 +90,15 @@ func form() templ.Component {
 func page(global, user int) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var5 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var5 == nil {
@@ -106,9 +121,6 @@ func page(global, user int) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

examples/counter/components/components_templ.go

@@ -10,8 +10,7 @@ import templruntime "github.com/a-h/templ/runtime"
 import "strconv"
 
 func border() templ.CSSClass {
-	templ_7745c5c3_CSSBuilder, _, templ_7745c5c3_release := templruntime.WriterToBuffer(nil)
-	defer templ_7745c5c3_release()
+	templ_7745c5c3_CSSBuilder := templruntime.GetBuilder()
 	templ_7745c5c3_CSSBuilder.WriteString(`border:1px solid #eeeeee;`)
 	templ_7745c5c3_CSSBuilder.WriteString(`border-radius:4px;`)
 	templ_7745c5c3_CSSBuilder.WriteString(`margin:10px;`)
@@ -27,8 +26,15 @@ func border() templ.CSSClass {
 func counts(global, session int) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -109,9 +115,6 @@ func counts(global, session int) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
@@ -119,8 +122,15 @@ func counts(global, session int) templ.Component {
 func Page(global, session int) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var8 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var8 == nil {
@@ -139,9 +149,6 @@ func Page(global, session int) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

examples/external-libraries/components_templ.go

@@ -22,8 +22,15 @@ func graph(data []TimeValue) templ.ComponentScript {
 func page(data []TimeValue) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -51,9 +58,6 @@ func page(data []TimeValue) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

examples/hello-world-ssr/hello_templ.go

@@ -10,8 +10,15 @@ import templruntime "github.com/a-h/templ/runtime"
 func hello(name string) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -35,9 +42,6 @@ func hello(name string) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

examples/hello-world-static/hello_templ.go

@@ -10,8 +10,15 @@ import templruntime "github.com/a-h/templ/runtime"
 func hello(name string) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -35,9 +42,6 @@ func hello(name string) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

examples/integration-chi/home_templ.go

@@ -10,8 +10,15 @@ import templruntime "github.com/a-h/templ/runtime"
 func Home() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -22,9 +29,6 @@ func Home() templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

examples/integration-echo/home_templ.go

@@ -10,8 +10,15 @@ import templruntime "github.com/a-h/templ/runtime"
 func Home() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -22,9 +29,6 @@ func Home() templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

examples/integration-gin/home_templ.go

@@ -10,8 +10,15 @@ import templruntime "github.com/a-h/templ/runtime"
 func Home() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -22,9 +29,6 @@ func Home() templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

examples/integration-go-echarts/components_templ.go

@@ -12,8 +12,15 @@ import "github.com/go-echarts/go-echarts/v2/charts"
 func Home(chart *charts.Bar) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -32,9 +39,6 @@ func Home(chart *charts.Bar) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

examples/integration-gofiber/home_templ.go

@@ -10,8 +10,15 @@ import templruntime "github.com/a-h/templ/runtime"
 func Home(name string) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -35,9 +42,6 @@ func Home(name string) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
@@ -45,8 +49,15 @@ func Home(name string) templ.Component {
 func NotFound() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var3 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var3 == nil {
@@ -57,9 +68,6 @@ func NotFound() templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

examples/integration-react/components_templ.go

@@ -10,8 +10,15 @@ import templruntime "github.com/a-h/templ/runtime"
 func Hello(name string) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -35,9 +42,6 @@ func Hello(name string) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
@@ -45,8 +49,15 @@ func Hello(name string) templ.Component {
 func page() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var3 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var3 == nil {
@@ -67,9 +78,6 @@ func page() templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

examples/internationalization/components_templ.go

@@ -12,8 +12,15 @@ import "github.com/invopop/ctxi18n/i18n"
 func page() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -63,9 +70,6 @@ func page() templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

examples/static-generator/blog_templ.go

@@ -15,8 +15,15 @@ import (
 func headerComponent(title string) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -40,9 +47,6 @@ func headerComponent(title string) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
@@ -50,8 +54,15 @@ func headerComponent(title string) templ.Component {
 func contentComponent(title string, body templ.Component) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var3 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var3 == nil {
@@ -83,9 +94,6 @@ func contentComponent(title string, body templ.Component) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
@@ -93,8 +101,15 @@ func contentComponent(title string, body templ.Component) templ.Component {
 func contentPage(title string, body templ.Component) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var5 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var5 == nil {
@@ -117,9 +132,6 @@ func contentPage(title string, body templ.Component) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
@@ -127,8 +139,15 @@ func contentPage(title string, body templ.Component) templ.Component {
 func indexPage(posts []Post) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var6 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var6 == nil {
@@ -179,9 +198,6 @@ func indexPage(posts []Post) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

examples/streaming/go.mod

@@ -0,0 +1,7 @@
+module githbu.com/a-h/templ/examples/streaming
+
+go 1.21.5
+
+replace github.com/a-h/templ => ../../
+
+require github.com/a-h/templ v0.2.707 // indirect

examples/streaming/main.templ

@@ -0,0 +1,53 @@
+package main
+
+import (
+	"fmt"
+	"net/http"
+	"time"
+)
+
+func main() {
+	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		// Create a channel to send data to the template.
+		data := make(chan string)
+		// Run a background process that will take 10 seconds to complete.
+		go func() {
+			// Always remember to close the channel.
+			defer close(data)
+			for i := 0; i < 10; i++ {
+				select {
+				case <-r.Context().Done():
+					// Quit early if the client is no longer connected.
+					return
+				case <-time.After(time.Second):
+					// Send a new piece of data to the channel.
+					data <- fmt.Sprintf("Part %d", i+1)
+				}
+			}
+		}()
+
+		// Pass the channel to the template.
+		component := Page(data)
+
+		// Serve using the streaming mode of the handler.
+		templ.Handler(component, templ.WithStreaming()).ServeHTTP(w, r)
+	})
+	http.ListenAndServe("127.0.0.1:8080", nil)
+}
+
+templ Page(data chan string) {
+	<!DOCTYPE html>
+	<html>
+		<head>
+			<title>Page</title>
+		</head>
+		<body>
+			<h1>Page</h1>
+			for d := range data {
+				@templ.Flush() {
+					<div>{ d }</div>
+				}
+			}
+		</body>
+	</html>
+}

examples/streaming/main_templ.go

@@ -0,0 +1,110 @@
+// Code generated by templ - DO NOT EDIT.
+
+package main
+
+//lint:file-ignore SA4006 This context is only used if a nested component is present.
+
+import "github.com/a-h/templ"
+import templruntime "github.com/a-h/templ/runtime"
+
+import (
+	"fmt"
+	"net/http"
+	"time"
+)
+
+func main() {
+	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		// Create a channel to send data to the template.
+		data := make(chan string)
+		// Run a background process that will take 10 seconds to complete.
+		go func() {
+			// Always remember to close the channel.
+			defer close(data)
+			for i := 0; i < 10; i++ {
+				select {
+				case <-r.Context().Done():
+					// Quit early if the client is no longer connected.
+					return
+				case <-time.After(time.Second):
+					// Send a new piece of data to the channel.
+					data <- fmt.Sprintf("Part %d", i+1)
+				}
+			}
+		}()
+
+		// Pass the channel to the template.
+		component := Page(data)
+
+		// Serve using the streaming mode of the handler.
+		templ.Handler(component, templ.WithStreaming()).ServeHTTP(w, r)
+	})
+	http.ListenAndServe("127.0.0.1:8080", nil)
+}
+
+func Page(data chan string) templ.Component {
+	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
+		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
+		ctx = templ.InitializeContext(ctx)
+		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
+		if templ_7745c5c3_Var1 == nil {
+			templ_7745c5c3_Var1 = templ.NopComponent
+		}
+		ctx = templ.ClearChildren(ctx)
+		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString("<!doctype html><html><head><title>Page</title></head><body><h1>Page</h1>")
+		if templ_7745c5c3_Err != nil {
+			return templ_7745c5c3_Err
+		}
+		for d := range data {
+			templ_7745c5c3_Var2 := templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
+				templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
+				templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+				if !templ_7745c5c3_IsBuffer {
+					defer func() {
+						templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+						if templ_7745c5c3_Err == nil {
+							templ_7745c5c3_Err = templ_7745c5c3_BufErr
+						}
+					}()
+				}
+				ctx = templ.InitializeContext(ctx)
+				_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString("<div>")
+				if templ_7745c5c3_Err != nil {
+					return templ_7745c5c3_Err
+				}
+				var templ_7745c5c3_Var3 string
+				templ_7745c5c3_Var3, templ_7745c5c3_Err = templ.JoinStringErrs(d)
+				if templ_7745c5c3_Err != nil {
+					return templ.Error{Err: templ_7745c5c3_Err, FileName: `examples/streaming/main.templ`, Line: 48, Col: 13}
+				}
+				_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var3))
+				if templ_7745c5c3_Err != nil {
+					return templ_7745c5c3_Err
+				}
+				_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString("</div>")
+				if templ_7745c5c3_Err != nil {
+					return templ_7745c5c3_Err
+				}
+				return templ_7745c5c3_Err
+			})
+			templ_7745c5c3_Err = templ.Flush().Render(templ.WithChildren(ctx, templ_7745c5c3_Var2), templ_7745c5c3_Buffer)
+			if templ_7745c5c3_Err != nil {
+				return templ_7745c5c3_Err
+			}
+		}
+		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString("</body></html>")
+		if templ_7745c5c3_Err != nil {
+			return templ_7745c5c3_Err
+		}
+		return templ_7745c5c3_Err
+	})
+}

examples/suspense/go.mod

@@ -0,0 +1,7 @@
+module githbu.com/a-h/templ/examples/suspense
+
+go 1.21.5
+
+replace github.com/a-h/templ => ../../
+
+require github.com/a-h/templ v0.2.707

examples/suspense/go.sum

@@ -0,0 +1,2 @@
+github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=

examples/suspense/main.templ

@@ -0,0 +1,111 @@
+package main
+
+import (
+	"net/http"
+	"sync"
+	"time"
+)
+
+func main() {
+	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		// Create a channel to send deferred component renders to the template.
+		data := make(chan SlotContents)
+
+		// We know there are 3 slots, so start a WaitGround.
+		var wg sync.WaitGroup
+		wg.Add(3)
+
+		// Start the async processes.
+		// Sidebar.
+		go func() {
+			defer wg.Done()
+			time.Sleep(time.Second * 3)
+			data <- SlotContents{
+				Name:     "a",
+				Contents: A(),
+			}
+		}()
+
+		// Content.
+		go func() {
+			defer wg.Done()
+			time.Sleep(time.Second * 2)
+			data <- SlotContents{
+				Name:     "b",
+				Contents: B(),
+			}
+		}()
+
+		// Footer.
+		go func() {
+			defer wg.Done()
+			time.Sleep(time.Second * 1)
+			data <- SlotContents{
+				Name:     "c",
+				Contents: C(),
+			}
+		}()
+
+		// Close the channel when all processes are done.
+		go func() {
+			wg.Wait()
+			close(data)
+		}()
+
+		// Pass the channel to the template.
+		component := Page(data)
+
+		// Serve using the streaming mode of the handler.
+		templ.Handler(component, templ.WithStreaming()).ServeHTTP(w, r)
+	})
+	http.ListenAndServe("127.0.0.1:8080", nil)
+}
+
+type SlotContents struct {
+	Name     string
+	Contents templ.Component
+}
+
+templ Slot(name string) {
+	<slot name={ name }>
+		<div>Loading { name }...</div>
+	</slot>
+}
+
+templ A() {
+	<div>Component A.</div>
+}
+
+templ B() {
+	<div>Component B.</div>
+}
+
+templ C() {
+	<div>Component C.</div>
+}
+
+templ Page(data chan SlotContents) {
+	<!DOCTYPE html>
+	<html>
+		<head>
+			<title>Page</title>
+		</head>
+		<body>
+			<h1>Page</h1>
+			@templ.Flush() {
+				<template shadowrootmode="open">
+					@Slot("a")
+					@Slot("b")
+					@Slot("c")
+				</template>
+			}
+			for sc := range data {
+				@templ.Flush() {
+					<div slot={ sc.Name }>
+						@sc.Contents
+					</div>
+				}
+			}
+		</body>
+	</html>
+}

examples/suspense/main_templ.go

@@ -0,0 +1,317 @@
+// Code generated by templ - DO NOT EDIT.
+
+package main
+
+//lint:file-ignore SA4006 This context is only used if a nested component is present.
+
+import "github.com/a-h/templ"
+import templruntime "github.com/a-h/templ/runtime"
+
+import (
+	"net/http"
+	"sync"
+	"time"
+)
+
+func main() {
+	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		// Create a channel to send deferred component renders to the template.
+		data := make(chan SlotContents)
+
+		// We know there are 3 slots, so start a WaitGround.
+		var wg sync.WaitGroup
+		wg.Add(3)
+
+		// Start the async processes.
+		// Sidebar.
+		go func() {
+			defer wg.Done()
+			time.Sleep(time.Second * 3)
+			data <- SlotContents{
+				Name:     "a",
+				Contents: A(),
+			}
+		}()
+
+		// Content.
+		go func() {
+			defer wg.Done()
+			time.Sleep(time.Second * 2)
+			data <- SlotContents{
+				Name:     "b",
+				Contents: B(),
+			}
+		}()
+
+		// Footer.
+		go func() {
+			defer wg.Done()
+			time.Sleep(time.Second * 1)
+			data <- SlotContents{
+				Name:     "c",
+				Contents: C(),
+			}
+		}()
+
+		// Close the channel when all processes are done.
+		go func() {
+			wg.Wait()
+			close(data)
+		}()
+
+		// Pass the channel to the template.
+		component := Page(data)
+
+		// Serve using the streaming mode of the handler.
+		templ.Handler(component, templ.WithStreaming()).ServeHTTP(w, r)
+	})
+	http.ListenAndServe("127.0.0.1:8080", nil)
+}
+
+type SlotContents struct {
+	Name     string
+	Contents templ.Component
+}
+
+func Slot(name string) templ.Component {
+	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
+		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
+		ctx = templ.InitializeContext(ctx)
+		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
+		if templ_7745c5c3_Var1 == nil {
+			templ_7745c5c3_Var1 = templ.NopComponent
+		}
+		ctx = templ.ClearChildren(ctx)
+		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString("<slot name=\"")
+		if templ_7745c5c3_Err != nil {
+			return templ_7745c5c3_Err
+		}
+		var templ_7745c5c3_Var2 string
+		templ_7745c5c3_Var2, templ_7745c5c3_Err = templ.JoinStringErrs(name)
+		if templ_7745c5c3_Err != nil {
+			return templ.Error{Err: templ_7745c5c3_Err, FileName: `examples/suspense/main.templ`, Line: 70, Col: 18}
+		}
+		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var2))
+		if templ_7745c5c3_Err != nil {
+			return templ_7745c5c3_Err
+		}
+		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString("\"><div>Loading ")
+		if templ_7745c5c3_Err != nil {
+			return templ_7745c5c3_Err
+		}
+		var templ_7745c5c3_Var3 string
+		templ_7745c5c3_Var3, templ_7745c5c3_Err = templ.JoinStringErrs(name)
+		if templ_7745c5c3_Err != nil {
+			return templ.Error{Err: templ_7745c5c3_Err, FileName: `examples/suspense/main.templ`, Line: 71, Col: 21}
+		}
+		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var3))
+		if templ_7745c5c3_Err != nil {
+			return templ_7745c5c3_Err
+		}
+		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString("...</div></slot>")
+		if templ_7745c5c3_Err != nil {
+			return templ_7745c5c3_Err
+		}
+		return templ_7745c5c3_Err
+	})
+}
+
+func A() templ.Component {
+	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
+		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
+		ctx = templ.InitializeContext(ctx)
+		templ_7745c5c3_Var4 := templ.GetChildren(ctx)
+		if templ_7745c5c3_Var4 == nil {
+			templ_7745c5c3_Var4 = templ.NopComponent
+		}
+		ctx = templ.ClearChildren(ctx)
+		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString("<div>Component A.</div>")
+		if templ_7745c5c3_Err != nil {
+			return templ_7745c5c3_Err
+		}
+		return templ_7745c5c3_Err
+	})
+}
+
+func B() templ.Component {
+	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
+		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
+		ctx = templ.InitializeContext(ctx)
+		templ_7745c5c3_Var5 := templ.GetChildren(ctx)
+		if templ_7745c5c3_Var5 == nil {
+			templ_7745c5c3_Var5 = templ.NopComponent
+		}
+		ctx = templ.ClearChildren(ctx)
+		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString("<div>Component B.</div>")
+		if templ_7745c5c3_Err != nil {
+			return templ_7745c5c3_Err
+		}
+		return templ_7745c5c3_Err
+	})
+}
+
+func C() templ.Component {
+	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
+		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
+		ctx = templ.InitializeContext(ctx)
+		templ_7745c5c3_Var6 := templ.GetChildren(ctx)
+		if templ_7745c5c3_Var6 == nil {
+			templ_7745c5c3_Var6 = templ.NopComponent
+		}
+		ctx = templ.ClearChildren(ctx)
+		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString("<div>Component C.</div>")
+		if templ_7745c5c3_Err != nil {
+			return templ_7745c5c3_Err
+		}
+		return templ_7745c5c3_Err
+	})
+}
+
+func Page(data chan SlotContents) templ.Component {
+	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
+		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
+		ctx = templ.InitializeContext(ctx)
+		templ_7745c5c3_Var7 := templ.GetChildren(ctx)
+		if templ_7745c5c3_Var7 == nil {
+			templ_7745c5c3_Var7 = templ.NopComponent
+		}
+		ctx = templ.ClearChildren(ctx)
+		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString("<!doctype html><html><head><title>Page</title></head><body><h1>Page</h1>")
+		if templ_7745c5c3_Err != nil {
+			return templ_7745c5c3_Err
+		}
+		templ_7745c5c3_Var8 := templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
+			templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
+			templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+			if !templ_7745c5c3_IsBuffer {
+				defer func() {
+					templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+					if templ_7745c5c3_Err == nil {
+						templ_7745c5c3_Err = templ_7745c5c3_BufErr
+					}
+				}()
+			}
+			ctx = templ.InitializeContext(ctx)
+			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString("<template shadowrootmode=\"open\">")
+			if templ_7745c5c3_Err != nil {
+				return templ_7745c5c3_Err
+			}
+			templ_7745c5c3_Err = Slot("a").Render(ctx, templ_7745c5c3_Buffer)
+			if templ_7745c5c3_Err != nil {
+				return templ_7745c5c3_Err
+			}
+			templ_7745c5c3_Err = Slot("b").Render(ctx, templ_7745c5c3_Buffer)
+			if templ_7745c5c3_Err != nil {
+				return templ_7745c5c3_Err
+			}
+			templ_7745c5c3_Err = Slot("c").Render(ctx, templ_7745c5c3_Buffer)
+			if templ_7745c5c3_Err != nil {
+				return templ_7745c5c3_Err
+			}
+			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString("</template>")
+			if templ_7745c5c3_Err != nil {
+				return templ_7745c5c3_Err
+			}
+			return templ_7745c5c3_Err
+		})
+		templ_7745c5c3_Err = templ.Flush().Render(templ.WithChildren(ctx, templ_7745c5c3_Var8), templ_7745c5c3_Buffer)
+		if templ_7745c5c3_Err != nil {
+			return templ_7745c5c3_Err
+		}
+		for sc := range data {
+			templ_7745c5c3_Var9 := templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
+				templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
+				templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+				if !templ_7745c5c3_IsBuffer {
+					defer func() {
+						templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+						if templ_7745c5c3_Err == nil {
+							templ_7745c5c3_Err = templ_7745c5c3_BufErr
+						}
+					}()
+				}
+				ctx = templ.InitializeContext(ctx)
+				_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString("<div slot=\"")
+				if templ_7745c5c3_Err != nil {
+					return templ_7745c5c3_Err
+				}
+				var templ_7745c5c3_Var10 string
+				templ_7745c5c3_Var10, templ_7745c5c3_Err = templ.JoinStringErrs(sc.Name)
+				if templ_7745c5c3_Err != nil {
+					return templ.Error{Err: templ_7745c5c3_Err, FileName: `examples/suspense/main.templ`, Line: 104, Col: 24}
+				}
+				_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var10))
+				if templ_7745c5c3_Err != nil {
+					return templ_7745c5c3_Err
+				}
+				_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString("\">")
+				if templ_7745c5c3_Err != nil {
+					return templ_7745c5c3_Err
+				}
+				templ_7745c5c3_Err = sc.Contents.Render(ctx, templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err != nil {
+					return templ_7745c5c3_Err
+				}
+				_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString("</div>")
+				if templ_7745c5c3_Err != nil {
+					return templ_7745c5c3_Err
+				}
+				return templ_7745c5c3_Err
+			})
+			templ_7745c5c3_Err = templ.Flush().Render(templ.WithChildren(ctx, templ_7745c5c3_Var9), templ_7745c5c3_Buffer)
+			if templ_7745c5c3_Err != nil {
+				return templ_7745c5c3_Err
+			}
+		}
+		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString("</body></html>")
+		if templ_7745c5c3_Err != nil {
+			return templ_7745c5c3_Err
+		}
+		return templ_7745c5c3_Err
+	})
+}

examples/syntax-and-usage/components/templsyntax_templ.go

@@ -10,8 +10,15 @@ import templruntime "github.com/a-h/templ/runtime"
 func list(items []string) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -45,9 +52,6 @@ func list(items []string) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

examples/typescript/components/index_templ.go

@@ -14,8 +14,15 @@ type Data struct {
 func Page(attributeData Data, scriptData Data) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -47,9 +54,6 @@ func Page(attributeData Data, scriptData Data) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

flush.go

@@ -0,0 +1,36 @@
+package templ
+
+import (
+	"context"
+	"io"
+)
+
+// Flush flushes the output buffer after all its child components have been rendered.
+func Flush() FlushComponent {
+	return FlushComponent{}
+}
+
+type FlushComponent struct {
+}
+
+type flusherError interface {
+	Flush() error
+}
+
+type flusher interface {
+	Flush()
+}
+
+func (f FlushComponent) Render(ctx context.Context, w io.Writer) (err error) {
+	if err = GetChildren(ctx).Render(ctx, w); err != nil {
+		return err
+	}
+	switch w := w.(type) {
+	case flusher:
+		w.Flush()
+		return nil
+	case flusherError:
+		return w.Flush()
+	}
+	return nil
+}

flush_test.go

@@ -0,0 +1,126 @@
+package templ
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"strings"
+	"testing"
+)
+
+type flushableErrorWriter struct {
+	lastFlushPos    int
+	pos             int
+	sb              strings.Builder
+	flushedSections []string
+}
+
+func (f *flushableErrorWriter) Write(p []byte) (n int, err error) {
+	n, err = f.sb.Write(p)
+	if err != nil {
+		return
+	}
+	if n < len(p) {
+		err = io.ErrShortWrite
+	}
+	f.pos += n
+	return
+}
+
+func (f *flushableErrorWriter) Flush() error {
+	f.flushedSections = append(f.flushedSections, f.sb.String()[f.lastFlushPos:f.pos])
+	f.lastFlushPos = f.pos
+	return nil
+}
+
+type flushableWriter struct {
+	lastFlushPos    int
+	pos             int
+	sb              strings.Builder
+	flushedSections []string
+}
+
+func (f *flushableWriter) Write(p []byte) (n int, err error) {
+	n, err = f.sb.Write(p)
+	if err != nil {
+		return
+	}
+	if n < len(p) {
+		err = io.ErrShortWrite
+	}
+	f.pos += n
+	return
+}
+
+func (f *flushableWriter) Flush() {
+	f.flushedSections = append(f.flushedSections, f.sb.String()[f.lastFlushPos:f.pos])
+	f.lastFlushPos = f.pos
+}
+
+func TestFlush(t *testing.T) {
+	t.Run("errors in child components are propagated", func(t *testing.T) {
+		expectedErr := fmt.Errorf("test error")
+		child := ComponentFunc(func(ctx context.Context, w io.Writer) error {
+			return expectedErr
+		})
+
+		sb := new(strings.Builder)
+		ctx := WithChildren(context.Background(), child)
+
+		err := Flush().Render(ctx, sb)
+		if err == nil {
+			t.Fatalf("expected an error, got nil")
+		}
+		if err != expectedErr {
+			t.Fatalf("expected error to be %v, got %v", expectedErr, err)
+		}
+	})
+	t.Run("can render to a flushable error writer", func(t *testing.T) {
+		child := ComponentFunc(func(ctx context.Context, w io.Writer) error {
+			_, err := w.Write([]byte("hello"))
+			return err
+		})
+
+		b := &flushableErrorWriter{}
+		ctx := WithChildren(context.Background(), child)
+
+		// Render the FlushComponent to the buffer
+		if err := Flush().Render(ctx, b); err != nil {
+			t.Fatalf("unexpected error: %v", err)
+		}
+
+		if len(b.flushedSections) != 1 {
+			t.Fatalf("expected 1 flushed section, got %d", len(b.flushedSections))
+		}
+		if b.flushedSections[0] != "hello" {
+			t.Fatalf("expected flushed section to be 'hello', got %q", b.flushedSections[0])
+		}
+	})
+	t.Run("can render to a flushable writer", func(t *testing.T) {
+		child := ComponentFunc(func(ctx context.Context, w io.Writer) error {
+			_, err := w.Write([]byte("hello"))
+			return err
+		})
+
+		b := &flushableWriter{}
+		ctx := WithChildren(context.Background(), child)
+
+		// Render the FlushComponent to the buffer
+		if err := Flush().Render(ctx, b); err != nil {
+			t.Fatalf("unexpected error: %v", err)
+		}
+
+		if len(b.flushedSections) != 1 {
+			t.Fatalf("expected 1 flushed section, got %d", len(b.flushedSections))
+		}
+		if b.flushedSections[0] != "hello" {
+			t.Fatalf("expected flushed section to be 'hello', got %q", b.flushedSections[0])
+		}
+	})
+	t.Run("non-flushable streams are a no-op", func(t *testing.T) {
+		sb := new(strings.Builder)
+		if err := Flush().Render(context.Background(), sb); err != nil {
+			t.Fatalf("expected no error, got %v", err)
+		}
+	})
+}

generator/generator.go

@@ -221,11 +221,8 @@ func (g *generator) writeCSS(n parser.CSSTemplate) error {
 	}
 	{
 		indentLevel++
-		// templ_7745c5c3_CSSBuilder, _, release := templruntime.WriterToBuffer(nil)
-		if _, err = g.w.WriteIndent(indentLevel, "templ_7745c5c3_CSSBuilder, _, templ_7745c5c3_release := templruntime.WriterToBuffer(nil)\n"); err != nil {
-			return err
-		}
-		if _, err = g.w.WriteIndent(indentLevel, "defer templ_7745c5c3_release()\n"); err != nil {
+		// templ_7745c5c3_CSSBuilder := templruntim.GetBuilder()
+		if _, err = g.w.WriteIndent(indentLevel, "templ_7745c5c3_CSSBuilder := templruntime.GetBuilder()\n"); err != nil {
 			return err
 		}
 		for i := 0; i < len(n.Properties); i++ {
@@ -304,11 +301,52 @@ func (g *generator) writeGoExpression(n parser.TemplateFileGoExpression) (err er
 }
 
 func (g *generator) writeTemplBuffer(indentLevel int) (err error) {
-	// templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-	if _, err = g.w.WriteIndent(indentLevel, "templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)\n"); err != nil {
+	// templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+	if _, err = g.w.WriteIndent(indentLevel, "templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)\n"); err != nil {
 		return err
 	}
-	if _, err = g.w.WriteIndent(indentLevel, "defer templ_7745c5c3_Release()\n"); err != nil {
+	// if !templ_7745c5c3_IsBuffer {
+	//	defer func() {
+	//		templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+	//		if templ_7745c5c3_Err == nil {
+	//			templ_7745c5c3_Err = templ_7745c5c3_BufErr
+	//		}
+	//	}()
+	// }
+	if _, err = g.w.WriteIndent(indentLevel, "if !templ_7745c5c3_IsBuffer {\n"); err != nil {
+		return err
+	}
+	{
+		indentLevel++
+		if _, err = g.w.WriteIndent(indentLevel, "defer func() {\n"); err != nil {
+			return err
+		}
+		{
+			indentLevel++
+			if _, err = g.w.WriteIndent(indentLevel, "templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)\n"); err != nil {
+				return err
+			}
+			if _, err = g.w.WriteIndent(indentLevel, "if templ_7745c5c3_Err == nil {\n"); err != nil {
+				return err
+			}
+			{
+				indentLevel++
+				if _, err = g.w.WriteIndent(indentLevel, "templ_7745c5c3_Err = templ_7745c5c3_BufErr\n"); err != nil {
+					return err
+				}
+				indentLevel--
+			}
+			if _, err = g.w.WriteIndent(indentLevel, "}\n"); err != nil {
+				return err
+			}
+			indentLevel--
+		}
+		if _, err = g.w.WriteIndent(indentLevel, "}()\n"); err != nil {
+			return err
+		}
+		indentLevel--
+	}
+	if _, err = g.w.WriteIndent(indentLevel, "}\n"); err != nil {
 		return err
 	}
 	return
@@ -378,21 +416,6 @@ func (g *generator) writeTemplate(nodeIdx int, t parser.HTMLTemplate) error {
 		if err = g.writeNodes(indentLevel, stripWhitespace(t.Children), nil); err != nil {
 			return err
 		}
-		// Return the buffer.
-		if _, err = g.w.WriteIndent(indentLevel, "if !templ_7745c5c3_IsBuffer {\n"); err != nil {
-			return err
-		}
-		{
-			indentLevel++
-			// _, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-			if _, err = g.w.WriteIndent(indentLevel, "_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)\n"); err != nil {
-				return err
-			}
-			indentLevel--
-		}
-		if _, err = g.w.WriteIndent(indentLevel, "}\n"); err != nil {
-			return err
-		}
 		// return templ_7745c5c3_Err
 		if _, err = g.w.WriteIndent(indentLevel, "return templ_7745c5c3_Err\n"); err != nil {
 			return err
@@ -700,21 +723,6 @@ func (g *generator) writeBlockTemplElementExpression(indentLevel int, n parser.T
 	if err = g.writeNodes(indentLevel, stripLeadingAndTrailingWhitespace(n.Children), nil); err != nil {
 		return err
 	}
-	// Return the buffer.
-	if _, err = g.w.WriteIndent(indentLevel, "if !templ_7745c5c3_IsBuffer {\n"); err != nil {
-		return err
-	}
-	{
-		indentLevel++
-		// _, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		if _, err = g.w.WriteIndent(indentLevel, "_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)\n"); err != nil {
-			return err
-		}
-		indentLevel--
-	}
-	if _, err = g.w.WriteIndent(indentLevel, "}\n"); err != nil {
-		return err
-	}
 	// return nil
 	if _, err = g.w.WriteIndent(indentLevel, "return templ_7745c5c3_Err\n"); err != nil {
 		return err

generator/test-a-href/template_templ.go

@@ -10,8 +10,15 @@ import templruntime "github.com/a-h/templ/runtime"
 func render() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -40,9 +47,6 @@ func render() templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

generator/test-attribute-errors/template_templ.go

@@ -21,8 +21,15 @@ func funcWithError(in error) (s string, err error) {
 func TestComponent(err error) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -72,9 +79,6 @@ func TestComponent(err error) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

generator/test-attribute-escaping/template_templ.go

@@ -10,8 +10,15 @@ import templruntime "github.com/a-h/templ/runtime"
 func BasicTemplate(url string) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -31,9 +38,6 @@ func BasicTemplate(url string) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

generator/test-call/template_templ.go

@@ -10,8 +10,15 @@ import templruntime "github.com/a-h/templ/runtime"
 func showAll() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -36,25 +43,26 @@ func showAll() templ.Component {
 		}
 		templ_7745c5c3_Var2 := templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 			templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-			templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-			defer templ_7745c5c3_Release()
+			templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+			if !templ_7745c5c3_IsBuffer {
+				defer func() {
+					templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+					if templ_7745c5c3_Err == nil {
+						templ_7745c5c3_Err = templ_7745c5c3_BufErr
+					}
+				}()
+			}
 			ctx = templ.InitializeContext(ctx)
 			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString("<div>Child content</div>")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
-			if !templ_7745c5c3_IsBuffer {
-				_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-			}
 			return templ_7745c5c3_Err
 		})
 		templ_7745c5c3_Err = wrapChildren().Render(templ.WithChildren(ctx, templ_7745c5c3_Var2), templ_7745c5c3_Buffer)
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
@@ -62,8 +70,15 @@ func showAll() templ.Component {
 func a() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var3 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var3 == nil {
@@ -74,9 +89,6 @@ func a() templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
@@ -84,8 +96,15 @@ func a() templ.Component {
 func b(child templ.Component) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var4 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var4 == nil {
@@ -100,9 +119,6 @@ func b(child templ.Component) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
@@ -110,8 +126,15 @@ func b(child templ.Component) templ.Component {
 func c(text string) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var5 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var5 == nil {
@@ -135,9 +158,6 @@ func c(text string) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
@@ -145,8 +165,15 @@ func c(text string) templ.Component {
 func d() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var7 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var7 == nil {
@@ -157,9 +184,6 @@ func d() templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
@@ -167,8 +191,15 @@ func d() templ.Component {
 func e() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var8 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var8 == nil {
@@ -179,9 +210,6 @@ func e() templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
@@ -189,8 +217,15 @@ func e() templ.Component {
 func showOne(component templ.Component) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var9 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var9 == nil {
@@ -209,9 +244,6 @@ func showOne(component templ.Component) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
@@ -219,8 +251,15 @@ func showOne(component templ.Component) templ.Component {
 func wrapChildren() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var10 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var10 == nil {
@@ -239,9 +278,6 @@ func wrapChildren() templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

generator/test-complex-attributes/template_templ.go

@@ -10,8 +10,15 @@ import templruntime "github.com/a-h/templ/runtime"
 func ComplexAttributes() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -22,9 +29,6 @@ func ComplexAttributes() templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

generator/test-constant-attribute-escaping/template_templ.go

@@ -10,8 +10,15 @@ import templruntime "github.com/a-h/templ/runtime"
 func BasicTemplate() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -22,9 +29,6 @@ func BasicTemplate() templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

generator/test-context/template_templ.go

@@ -14,8 +14,15 @@ var contextKeyName contextKey = "name"
 func render() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -60,9 +67,6 @@ func render() templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

generator/test-css-expression/template_templ.go

@@ -8,8 +8,7 @@ import "github.com/a-h/templ"
 import templruntime "github.com/a-h/templ/runtime"
 
 func className() templ.CSSClass {
-	templ_7745c5c3_CSSBuilder, _, templ_7745c5c3_release := templruntime.WriterToBuffer(nil)
-	defer templ_7745c5c3_release()
+	templ_7745c5c3_CSSBuilder := templruntime.GetBuilder()
 	templ_7745c5c3_CSSBuilder.WriteString(`background-color:#ffffff;`)
 	templ_7745c5c3_CSSBuilder.WriteString(`max-height:calc(100vh - 170px);`)
 	templ_7745c5c3_CSSBuilder.WriteString(string(templ.SanitizeCSS(`color`, red)))

generator/test-css-middleware/template_templ.go

@@ -8,8 +8,7 @@ import "github.com/a-h/templ"
 import templruntime "github.com/a-h/templ/runtime"
 
 func red() templ.CSSClass {
-	templ_7745c5c3_CSSBuilder, _, templ_7745c5c3_release := templruntime.WriterToBuffer(nil)
-	defer templ_7745c5c3_release()
+	templ_7745c5c3_CSSBuilder := templruntime.GetBuilder()
 	templ_7745c5c3_CSSBuilder.WriteString(`color:red;`)
 	templ_7745c5c3_CSSID := templ.CSSID(`red`, templ_7745c5c3_CSSBuilder.String())
 	return templ.ComponentCSSClass{
@@ -21,8 +20,15 @@ func red() templ.CSSClass {
 func render(s string) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -64,9 +70,6 @@ func render(s string) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

generator/test-css-usage/template_templ.go

@@ -15,8 +15,15 @@ import (
 func StyleTagsAreSupported() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -27,9 +34,6 @@ func StyleTagsAreSupported() templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
@@ -39,8 +43,7 @@ func StyleTagsAreSupported() templ.Component {
 const red = "#00ff00"
 
 func cssComponentGreen() templ.CSSClass {
-	templ_7745c5c3_CSSBuilder, _, templ_7745c5c3_release := templruntime.WriterToBuffer(nil)
-	defer templ_7745c5c3_release()
+	templ_7745c5c3_CSSBuilder := templruntime.GetBuilder()
 	templ_7745c5c3_CSSBuilder.WriteString(string(templ.SanitizeCSS(`color`, red)))
 	templ_7745c5c3_CSSID := templ.CSSID(`cssComponentGreen`, templ_7745c5c3_CSSBuilder.String())
 	return templ.ComponentCSSClass{
@@ -52,8 +55,15 @@ func cssComponentGreen() templ.CSSClass {
 func CSSComponentsAreSupported() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var2 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var2 == nil {
@@ -82,9 +92,6 @@ func CSSComponentsAreSupported() templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
@@ -94,8 +101,15 @@ func CSSComponentsAreSupported() templ.Component {
 func CSSComponentsAndConstantsAreSupported() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var5 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var5 == nil {
@@ -146,9 +160,6 @@ func CSSComponentsAndConstantsAreSupported() templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
@@ -157,8 +168,15 @@ func CSSComponentsAndConstantsAreSupported() templ.Component {
 func MapsCanBeUsedToConditionallySetClasses() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var10 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var10 == nil {
@@ -187,17 +205,13 @@ func MapsCanBeUsedToConditionallySetClasses() templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
 
 // The templ.KV function can be used to add a class if a condition is true.
 func d() templ.CSSClass {
-	templ_7745c5c3_CSSBuilder, _, templ_7745c5c3_release := templruntime.WriterToBuffer(nil)
-	defer templ_7745c5c3_release()
+	templ_7745c5c3_CSSBuilder := templruntime.GetBuilder()
 	templ_7745c5c3_CSSBuilder.WriteString(`font-size:12pt;`)
 	templ_7745c5c3_CSSID := templ.CSSID(`d`, templ_7745c5c3_CSSBuilder.String())
 	return templ.ComponentCSSClass{
@@ -207,8 +221,7 @@ func d() templ.CSSClass {
 }
 
 func e() templ.CSSClass {
-	templ_7745c5c3_CSSBuilder, _, templ_7745c5c3_release := templruntime.WriterToBuffer(nil)
-	defer templ_7745c5c3_release()
+	templ_7745c5c3_CSSBuilder := templruntime.GetBuilder()
 	templ_7745c5c3_CSSBuilder.WriteString(`font-size:14pt;`)
 	templ_7745c5c3_CSSID := templ.CSSID(`e`, templ_7745c5c3_CSSBuilder.String())
 	return templ.ComponentCSSClass{
@@ -220,8 +233,15 @@ func e() templ.CSSClass {
 func KVCanBeUsedToConditionallySetClasses() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var13 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var13 == nil {
@@ -250,9 +270,6 @@ func KVCanBeUsedToConditionallySetClasses() templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
@@ -261,8 +278,15 @@ func KVCanBeUsedToConditionallySetClasses() templ.Component {
 func PsuedoAttributesAndComplexClassNamesAreSupported() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var16 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var16 == nil {
@@ -291,9 +315,6 @@ func PsuedoAttributesAndComplexClassNamesAreSupported() templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
@@ -302,8 +323,15 @@ func PsuedoAttributesAndComplexClassNamesAreSupported() templ.Component {
 func ClassNamesAreHTMLEscaped() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var19 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var19 == nil {
@@ -332,17 +360,13 @@ func ClassNamesAreHTMLEscaped() templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
 
 // CSS components can be used with arguments.
 func loading(percent int) templ.CSSClass {
-	templ_7745c5c3_CSSBuilder, _, templ_7745c5c3_release := templruntime.WriterToBuffer(nil)
-	defer templ_7745c5c3_release()
+	templ_7745c5c3_CSSBuilder := templruntime.GetBuilder()
 	templ_7745c5c3_CSSBuilder.WriteString(string(templ.SanitizeCSS(`width`, fmt.Sprintf("%d%%", percent))))
 	templ_7745c5c3_CSSID := templ.CSSID(`loading`, templ_7745c5c3_CSSBuilder.String())
 	return templ.ComponentCSSClass{
@@ -354,8 +378,15 @@ func loading(percent int) templ.CSSClass {
 func CSSComponentsCanBeUsedWithArguments() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var22 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var22 == nil {
@@ -406,16 +437,12 @@ func CSSComponentsCanBeUsedWithArguments() templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
 
 func windVaneRotation(degrees float64) templ.CSSClass {
-	templ_7745c5c3_CSSBuilder, _, templ_7745c5c3_release := templruntime.WriterToBuffer(nil)
-	defer templ_7745c5c3_release()
+	templ_7745c5c3_CSSBuilder := templruntime.GetBuilder()
 	templ_7745c5c3_CSSBuilder.WriteString(string(templ.SanitizeCSS(`transform`, templ.SafeCSSProperty(fmt.Sprintf("rotate(%ddeg)", int(math.Round(degrees)))))))
 	templ_7745c5c3_CSSID := templ.CSSID(`windVaneRotation`, templ_7745c5c3_CSSBuilder.String())
 	return templ.ComponentCSSClass{
@@ -427,8 +454,15 @@ func windVaneRotation(degrees float64) templ.CSSClass {
 func Rotate(degrees float64) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var27 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var27 == nil {
@@ -457,9 +491,6 @@ func Rotate(degrees float64) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
@@ -468,8 +499,15 @@ func Rotate(degrees float64) templ.Component {
 func TestComponent() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var30 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var30 == nil {
@@ -512,9 +550,6 @@ func TestComponent() templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

generator/test-doctype/template_templ.go

@@ -10,8 +10,15 @@ import templruntime "github.com/a-h/templ/runtime"
 func Layout(title, content string) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -48,9 +55,6 @@ func Layout(title, content string) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

generator/test-element-attributes/template_templ.go

@@ -8,8 +8,7 @@ import "github.com/a-h/templ"
 import templruntime "github.com/a-h/templ/runtime"
 
 func important() templ.CSSClass {
-	templ_7745c5c3_CSSBuilder, _, templ_7745c5c3_release := templruntime.WriterToBuffer(nil)
-	defer templ_7745c5c3_release()
+	templ_7745c5c3_CSSBuilder := templruntime.GetBuilder()
 	templ_7745c5c3_CSSBuilder.WriteString(`width:100;`)
 	templ_7745c5c3_CSSID := templ.CSSID(`important`, templ_7745c5c3_CSSBuilder.String())
 	return templ.ComponentCSSClass{
@@ -19,8 +18,7 @@ func important() templ.CSSClass {
 }
 
 func unimportant() templ.CSSClass {
-	templ_7745c5c3_CSSBuilder, _, templ_7745c5c3_release := templruntime.WriterToBuffer(nil)
-	defer templ_7745c5c3_release()
+	templ_7745c5c3_CSSBuilder := templruntime.GetBuilder()
 	templ_7745c5c3_CSSBuilder.WriteString(`width:50;`)
 	templ_7745c5c3_CSSID := templ.CSSID(`unimportant`, templ_7745c5c3_CSSBuilder.String())
 	return templ.ComponentCSSClass{
@@ -32,8 +30,15 @@ func unimportant() templ.CSSClass {
 func render(p person) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -159,9 +164,6 @@ func render(p person) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

generator/test-elseif/template_templ.go

@@ -10,8 +10,15 @@ import templruntime "github.com/a-h/templ/runtime"
 func render(d data) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -127,9 +134,6 @@ func render(d data) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

generator/test-for/template_templ.go

@@ -10,8 +10,15 @@ import templruntime "github.com/a-h/templ/runtime"
 func render(items []string) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -37,9 +44,6 @@ func render(items []string) templ.Component {
 				return templ_7745c5c3_Err
 			}
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

generator/test-form-action/template_templ.go

@@ -10,8 +10,15 @@ import templruntime "github.com/a-h/templ/runtime"
 func render() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -40,9 +47,6 @@ func render() templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

generator/test-go-comments/template_templ.go

@@ -10,8 +10,15 @@ import templruntime "github.com/a-h/templ/runtime"
 func render(content string) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -35,9 +42,6 @@ func render(content string) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

generator/test-go-template-in-templ/template_templ.go

@@ -14,8 +14,15 @@ var goTemplate = template.Must(template.New("example").Parse("<div>{{ . }}</div>
 func Example() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -34,9 +41,6 @@ func Example() templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

generator/test-html-comment/template_templ.go

@@ -10,8 +10,15 @@ import templruntime "github.com/a-h/templ/runtime"
 func render(content string) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -59,9 +66,6 @@ func render(content string) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
@@ -69,8 +73,15 @@ func render(content string) templ.Component {
 func paragraph(content string) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var3 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var3 == nil {
@@ -94,9 +105,6 @@ func paragraph(content string) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

generator/test-html/template_templ.go

@@ -10,8 +10,15 @@ import templruntime "github.com/a-h/templ/runtime"
 func render(p person) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -100,9 +107,6 @@ func render(p person) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

generator/test-if/template_templ.go

@@ -10,8 +10,15 @@ import templruntime "github.com/a-h/templ/runtime"
 func render(d data) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -39,9 +46,6 @@ func render(d data) templ.Component {
 				return templ_7745c5c3_Err
 			}
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

generator/test-ifelse/template_templ.go

@@ -10,8 +10,15 @@ import templruntime "github.com/a-h/templ/runtime"
 func render(d data) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -39,9 +46,6 @@ func render(d data) templ.Component {
 				return templ_7745c5c3_Err
 			}
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

generator/test-import/template_templ.go

@@ -10,8 +10,15 @@ import templruntime "github.com/a-h/templ/runtime"
 func listItem() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -30,9 +37,6 @@ func listItem() templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
@@ -40,8 +44,15 @@ func listItem() templ.Component {
 func list() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var2 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var2 == nil {
@@ -60,9 +71,6 @@ func list() templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
@@ -70,8 +78,15 @@ func list() templ.Component {
 func main() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var3 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var3 == nil {
@@ -80,21 +95,32 @@ func main() templ.Component {
 		ctx = templ.ClearChildren(ctx)
 		templ_7745c5c3_Var4 := templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 			templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-			templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-			defer templ_7745c5c3_Release()
+			templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+			if !templ_7745c5c3_IsBuffer {
+				defer func() {
+					templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+					if templ_7745c5c3_Err == nil {
+						templ_7745c5c3_Err = templ_7745c5c3_BufErr
+					}
+				}()
+			}
 			ctx = templ.InitializeContext(ctx)
 			templ_7745c5c3_Var5 := templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 				templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-				templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-				defer templ_7745c5c3_Release()
+				templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+				if !templ_7745c5c3_IsBuffer {
+					defer func() {
+						templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+						if templ_7745c5c3_Err == nil {
+							templ_7745c5c3_Err = templ_7745c5c3_BufErr
+						}
+					}()
+				}
 				ctx = templ.InitializeContext(ctx)
 				_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString("<u>Item 1</u>")
 				if templ_7745c5c3_Err != nil {
 					return templ_7745c5c3_Err
 				}
-				if !templ_7745c5c3_IsBuffer {
-					_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-				}
 				return templ_7745c5c3_Err
 			})
 			templ_7745c5c3_Err = listItem().Render(templ.WithChildren(ctx, templ_7745c5c3_Var5), templ_7745c5c3_Buffer)
@@ -107,16 +133,20 @@ func main() templ.Component {
 			}
 			templ_7745c5c3_Var6 := templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 				templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-				templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-				defer templ_7745c5c3_Release()
+				templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+				if !templ_7745c5c3_IsBuffer {
+					defer func() {
+						templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+						if templ_7745c5c3_Err == nil {
+							templ_7745c5c3_Err = templ_7745c5c3_BufErr
+						}
+					}()
+				}
 				ctx = templ.InitializeContext(ctx)
 				_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString("<u>Item 2</u>")
 				if templ_7745c5c3_Err != nil {
 					return templ_7745c5c3_Err
 				}
-				if !templ_7745c5c3_IsBuffer {
-					_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-				}
 				return templ_7745c5c3_Err
 			})
 			templ_7745c5c3_Err = listItem().Render(templ.WithChildren(ctx, templ_7745c5c3_Var6), templ_7745c5c3_Buffer)
@@ -129,34 +159,32 @@ func main() templ.Component {
 			}
 			templ_7745c5c3_Var7 := templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 				templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-				templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-				defer templ_7745c5c3_Release()
+				templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+				if !templ_7745c5c3_IsBuffer {
+					defer func() {
+						templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+						if templ_7745c5c3_Err == nil {
+							templ_7745c5c3_Err = templ_7745c5c3_BufErr
+						}
+					}()
+				}
 				ctx = templ.InitializeContext(ctx)
 				_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString("<u>Item 3</u>")
 				if templ_7745c5c3_Err != nil {
 					return templ_7745c5c3_Err
 				}
-				if !templ_7745c5c3_IsBuffer {
-					_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-				}
 				return templ_7745c5c3_Err
 			})
 			templ_7745c5c3_Err = listItem().Render(templ.WithChildren(ctx, templ_7745c5c3_Var7), templ_7745c5c3_Buffer)
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
-			if !templ_7745c5c3_IsBuffer {
-				_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-			}
 			return templ_7745c5c3_Err
 		})
 		templ_7745c5c3_Err = list().Render(templ.WithChildren(ctx, templ_7745c5c3_Var4), templ_7745c5c3_Buffer)
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

generator/test-method/template_templ.go

@@ -14,8 +14,15 @@ type Data struct {
 func (d Data) Method() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -39,9 +46,6 @@ func (d Data) Method() templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

generator/test-once/template_templ.go

@@ -12,8 +12,15 @@ var helloHandle = templ.NewOnceHandle()
 func hello(label, name string) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -22,16 +29,20 @@ func hello(label, name string) templ.Component {
 		ctx = templ.ClearChildren(ctx)
 		templ_7745c5c3_Var2 := templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 			templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-			templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-			defer templ_7745c5c3_Release()
+			templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+			if !templ_7745c5c3_IsBuffer {
+				defer func() {
+					templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+					if templ_7745c5c3_Err == nil {
+						templ_7745c5c3_Err = templ_7745c5c3_BufErr
+					}
+				}()
+			}
 			ctx = templ.InitializeContext(ctx)
 			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString("<script type=\"text/javascript\">\n\t\t\tfunction hello(name) {\n\t\t\t\talert('Hello, ' + name + '!');\n\t\t\t}\n\t\t</script>")
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
-			if !templ_7745c5c3_IsBuffer {
-				_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-			}
 			return templ_7745c5c3_Err
 		})
 		templ_7745c5c3_Err = helloHandle.Once().Render(templ.WithChildren(ctx, templ_7745c5c3_Var2), templ_7745c5c3_Buffer)
@@ -68,9 +79,6 @@ func hello(label, name string) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
@@ -78,8 +86,15 @@ func hello(label, name string) templ.Component {
 func render() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var5 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var5 == nil {
@@ -94,9 +109,6 @@ func render() templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

generator/test-raw-elements/template_templ.go

@@ -10,8 +10,15 @@ import templruntime "github.com/a-h/templ/runtime"
 func Example() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -30,9 +37,6 @@ func Example() templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

generator/test-script-inline/template_templ.go

@@ -30,8 +30,15 @@ func withoutParameters() templ.ComponentScript {
 func InlineJavascript(a string) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -54,9 +61,6 @@ func InlineJavascript(a string) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

generator/test-script-usage-nonce/template_templ.go

@@ -40,8 +40,15 @@ func onClick() templ.ComponentScript {
 func Button(text string) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -87,9 +94,6 @@ func Button(text string) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
@@ -107,8 +111,15 @@ func withComment() templ.ComponentScript {
 func ThreeButtons() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var5 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var5 == nil {
@@ -148,9 +159,6 @@ func ThreeButtons() templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
@@ -168,8 +176,15 @@ func conditionalScript() templ.ComponentScript {
 func Conditional(show bool) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var7 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var7 == nil {
@@ -203,9 +218,6 @@ func Conditional(show bool) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

generator/test-script-usage/template_templ.go

@@ -40,8 +40,15 @@ func onClick() templ.ComponentScript {
 func Button(text string) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -87,9 +94,6 @@ func Button(text string) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
@@ -107,8 +111,15 @@ func withComment() templ.ComponentScript {
 func ThreeButtons() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var5 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var5 == nil {
@@ -152,9 +163,6 @@ func ThreeButtons() templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
@@ -172,8 +180,15 @@ func conditionalScript() templ.ComponentScript {
 func Conditional(show bool) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var7 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var7 == nil {
@@ -207,9 +222,6 @@ func Conditional(show bool) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
@@ -227,8 +239,15 @@ func alertTest() templ.ComponentScript {
 func ScriptOnLoad() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var9 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var9 == nil {
@@ -252,9 +271,6 @@ func ScriptOnLoad() templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

generator/test-spread-attributes/template_templ.go

@@ -10,8 +10,15 @@ import templruntime "github.com/a-h/templ/runtime"
 func BasicTemplate(spread templ.Attributes) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -50,9 +57,6 @@ func BasicTemplate(spread templ.Attributes) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

generator/test-string-errors/template_templ.go

@@ -21,8 +21,15 @@ func funcWithError(in error) (s string, err error) {
 func TestComponent(err error) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -72,9 +79,6 @@ func TestComponent(err error) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

generator/test-string/template_templ.go

@@ -10,8 +10,15 @@ import templruntime "github.com/a-h/templ/runtime"
 func render(s string) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -74,9 +81,6 @@ func render(s string) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

generator/test-switch/template_templ.go

@@ -10,8 +10,15 @@ import templruntime "github.com/a-h/templ/runtime"
 func render(input string) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -40,9 +47,6 @@ func render(input string) templ.Component {
 				return templ_7745c5c3_Err
 			}
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

generator/test-switchdefault/template_templ.go

@@ -10,8 +10,15 @@ import templruntime "github.com/a-h/templ/runtime"
 func template(input string) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -40,9 +47,6 @@ func template(input string) templ.Component {
 				return templ_7745c5c3_Err
 			}
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

generator/test-templ-element/template_templ.go

@@ -12,8 +12,15 @@ import "fmt"
 func wrapper(index int) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -45,9 +52,6 @@ func wrapper(index int) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
@@ -55,8 +59,15 @@ func wrapper(index int) templ.Component {
 func template() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var3 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var3 == nil {
@@ -65,8 +76,15 @@ func template() templ.Component {
 		ctx = templ.ClearChildren(ctx)
 		templ_7745c5c3_Var4 := templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 			templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-			templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-			defer templ_7745c5c3_Release()
+			templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+			if !templ_7745c5c3_IsBuffer {
+				defer func() {
+					templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+					if templ_7745c5c3_Err == nil {
+						templ_7745c5c3_Err = templ_7745c5c3_BufErr
+					}
+				}()
+			}
 			ctx = templ.InitializeContext(ctx)
 			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString("child1")
 			if templ_7745c5c3_Err != nil {
@@ -74,8 +92,15 @@ func template() templ.Component {
 			}
 			templ_7745c5c3_Var5 := templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 				templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-				templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-				defer templ_7745c5c3_Release()
+				templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+				if !templ_7745c5c3_IsBuffer {
+					defer func() {
+						templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+						if templ_7745c5c3_Err == nil {
+							templ_7745c5c3_Err = templ_7745c5c3_BufErr
+						}
+					}()
+				}
 				ctx = templ.InitializeContext(ctx)
 				_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString("child2")
 				if templ_7745c5c3_Err != nil {
@@ -83,8 +108,15 @@ func template() templ.Component {
 				}
 				templ_7745c5c3_Var6 := templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 					templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-					templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-					defer templ_7745c5c3_Release()
+					templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+					if !templ_7745c5c3_IsBuffer {
+						defer func() {
+							templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+							if templ_7745c5c3_Err == nil {
+								templ_7745c5c3_Err = templ_7745c5c3_BufErr
+							}
+						}()
+					}
 					ctx = templ.InitializeContext(ctx)
 					_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString("child3")
 					if templ_7745c5c3_Err != nil {
@@ -94,36 +126,24 @@ func template() templ.Component {
 					if templ_7745c5c3_Err != nil {
 						return templ_7745c5c3_Err
 					}
-					if !templ_7745c5c3_IsBuffer {
-						_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-					}
 					return templ_7745c5c3_Err
 				})
 				templ_7745c5c3_Err = wrapper(3).Render(templ.WithChildren(ctx, templ_7745c5c3_Var6), templ_7745c5c3_Buffer)
 				if templ_7745c5c3_Err != nil {
 					return templ_7745c5c3_Err
 				}
-				if !templ_7745c5c3_IsBuffer {
-					_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-				}
 				return templ_7745c5c3_Err
 			})
 			templ_7745c5c3_Err = wrapper(2).Render(templ.WithChildren(ctx, templ_7745c5c3_Var5), templ_7745c5c3_Buffer)
 			if templ_7745c5c3_Err != nil {
 				return templ_7745c5c3_Err
 			}
-			if !templ_7745c5c3_IsBuffer {
-				_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-			}
 			return templ_7745c5c3_Err
 		})
 		templ_7745c5c3_Err = wrapper(1).Render(templ.WithChildren(ctx, templ_7745c5c3_Var4), templ_7745c5c3_Buffer)
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

generator/test-templ-in-go-template/template_templ.go

@@ -20,8 +20,15 @@ var example = template.Must(template.New("example").Parse(`<!DOCTYPE html>
 func greeting() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -32,9 +39,6 @@ func greeting() templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

generator/test-text-whitespace/template_templ.go

@@ -10,8 +10,15 @@ import templruntime "github.com/a-h/templ/runtime"
 func WhitespaceIsAddedWithinTemplStatements() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -32,9 +39,6 @@ func WhitespaceIsAddedWithinTemplStatements() templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
@@ -44,8 +48,15 @@ const WhitespaceIsAddedWithinTemplStatementsExpected = `<p>This is some text. So
 func InlineElementsAreNotPadded() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var2 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var2 == nil {
@@ -56,9 +67,6 @@ func InlineElementsAreNotPadded() templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
@@ -68,8 +76,15 @@ const InlineElementsAreNotPaddedExpected = `<p>Inline text <b>is spaced properly
 func WhiteSpaceInHTMLIsNormalised() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var3 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var3 == nil {
@@ -80,9 +95,6 @@ func WhiteSpaceInHTMLIsNormalised() templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
@@ -92,8 +104,15 @@ const WhiteSpaceInHTMLIsNormalisedExpected = `<p>newlines and other whitespace a
 func WhiteSpaceAroundValues() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var4 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var4 == nil {
@@ -117,9 +136,6 @@ func WhiteSpaceAroundValues() templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
@@ -131,8 +147,15 @@ const WhiteSpaceAroundTemplatedValuesExpected = `<div>templ allows whitespace ar
 func WhiteSpaceAroundTemplatedValues(prefix, statement string) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var6 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var6 == nil {
@@ -169,9 +192,6 @@ func WhiteSpaceAroundTemplatedValues(prefix, statement string) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

generator/test-text/template_templ.go

@@ -10,8 +10,15 @@ import templruntime "github.com/a-h/templ/runtime"
 func BasicTemplate(name string) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -48,9 +55,6 @@ func BasicTemplate(name string) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

generator/test-void/template_templ.go

@@ -10,8 +10,15 @@ import templruntime "github.com/a-h/templ/runtime"
 func render() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -22,9 +29,6 @@ func render() templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

generator/test-whitespace-around-go-keywords/template_templ.go

@@ -12,8 +12,15 @@ import "fmt"
 func WhitespaceIsConsistentInIf(firstIf, secondIf bool) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -44,9 +51,6 @@ func WhitespaceIsConsistentInIf(firstIf, secondIf bool) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
@@ -58,8 +62,15 @@ const WhitespaceIsConsistentInTrueElseExpected = `<button>Start</button> <button
 func WhitespaceIsConsistentInFalseIf() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var2 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var2 == nil {
@@ -80,9 +91,6 @@ func WhitespaceIsConsistentInFalseIf() templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
@@ -92,8 +100,15 @@ const WhitespaceIsConsistentInFalseIfExpected = `<button>Start</button> <button>
 func WhitespaceIsConsistentInSwitch(i int) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var3 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var3 == nil {
@@ -120,9 +135,6 @@ func WhitespaceIsConsistentInSwitch(i int) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
@@ -133,8 +145,15 @@ const WhitespaceIsConsistentInDefaultSwitchExpected = `<button>Start</button> <b
 func WhitespaceIsConsistentInSwitchNoDefault() templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var4 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var4 == nil {
@@ -156,9 +175,6 @@ func WhitespaceIsConsistentInSwitchNoDefault() templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
@@ -168,8 +184,15 @@ const WhitespaceIsConsistentInSwitchNoDefaultExpected = `<button>Start</button>
 func WhitespaceIsConsistentInFor(i int) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var5 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var5 == nil {
@@ -203,9 +226,6 @@ func WhitespaceIsConsistentInFor(i int) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }

handler.go

@@ -0,0 +1,102 @@
+package templ
+
+import "net/http"
+
+// ComponentHandler is a http.Handler that renders components.
+type ComponentHandler struct {
+	Component      Component
+	Status         int
+	ContentType    string
+	ErrorHandler   func(r *http.Request, err error) http.Handler
+	StreamResponse bool
+}
+
+const componentHandlerErrorMessage = "templ: failed to render template"
+
+func (ch *ComponentHandler) ServeHTTPBuffered(w http.ResponseWriter, r *http.Request) {
+	// Since the component may error, write to a buffer first.
+	// This prevents partial responses from being written to the client.
+	buf := GetBuffer()
+	defer ReleaseBuffer(buf)
+	err := ch.Component.Render(r.Context(), buf)
+	if err != nil {
+		if ch.ErrorHandler != nil {
+			w.Header().Set("Content-Type", ch.ContentType)
+			ch.ErrorHandler(r, err).ServeHTTP(w, r)
+			return
+		}
+		http.Error(w, componentHandlerErrorMessage, http.StatusInternalServerError)
+		return
+	}
+	w.Header().Set("Content-Type", ch.ContentType)
+	if ch.Status != 0 {
+		w.WriteHeader(ch.Status)
+	}
+	// Ignore write error like http.Error() does, because there is
+	// no way to recover at this point.
+	_, _ = w.Write(buf.Bytes())
+}
+
+func (ch *ComponentHandler) ServeHTTPStreamed(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("Content-Type", ch.ContentType)
+	if ch.Status != 0 {
+		w.WriteHeader(ch.Status)
+	}
+	if err := ch.Component.Render(r.Context(), w); err != nil {
+		if ch.ErrorHandler != nil {
+			w.Header().Set("Content-Type", ch.ContentType)
+			ch.ErrorHandler(r, err).ServeHTTP(w, r)
+			return
+		}
+		http.Error(w, componentHandlerErrorMessage, http.StatusInternalServerError)
+	}
+}
+
+// ServeHTTP implements the http.Handler interface.
+func (ch ComponentHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	if ch.StreamResponse {
+		ch.ServeHTTPStreamed(w, r)
+		return
+	}
+	ch.ServeHTTPBuffered(w, r)
+}
+
+// Handler creates a http.Handler that renders the template.
+func Handler(c Component, options ...func(*ComponentHandler)) *ComponentHandler {
+	ch := &ComponentHandler{
+		Component:   c,
+		ContentType: "text/html; charset=utf-8",
+	}
+	for _, o := range options {
+		o(ch)
+	}
+	return ch
+}
+
+// WithStatus sets the HTTP status code returned by the ComponentHandler.
+func WithStatus(status int) func(*ComponentHandler) {
+	return func(ch *ComponentHandler) {
+		ch.Status = status
+	}
+}
+
+// WithContentType sets the Content-Type header returned by the ComponentHandler.
+func WithContentType(contentType string) func(*ComponentHandler) {
+	return func(ch *ComponentHandler) {
+		ch.ContentType = contentType
+	}
+}
+
+// WithErrorHandler sets the error handler used if rendering fails.
+func WithErrorHandler(eh func(r *http.Request, err error) http.Handler) func(*ComponentHandler) {
+	return func(ch *ComponentHandler) {
+		ch.ErrorHandler = eh
+	}
+}
+
+// WithStreaming sets the ComponentHandler to stream the response instead of buffering it.
+func WithStreaming() func(*ComponentHandler) {
+	return func(ch *ComponentHandler) {
+		ch.StreamResponse = true
+	}
+}

handler_test.go

@@ -0,0 +1,207 @@
+package templ_test
+
+import (
+	"context"
+	"errors"
+	"io"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/a-h/templ"
+	"github.com/google/go-cmp/cmp"
+)
+
+func TestHandler(t *testing.T) {
+	hello := templ.ComponentFunc(func(ctx context.Context, w io.Writer) error {
+		if _, err := io.WriteString(w, "Hello"); err != nil {
+			t.Fatalf("failed to write string: %v", err)
+		}
+		return nil
+	})
+	errorComponent := templ.ComponentFunc(func(ctx context.Context, w io.Writer) error {
+		if _, err := io.WriteString(w, "Hello"); err != nil {
+			t.Fatalf("failed to write string: %v", err)
+		}
+		return errors.New("handler error")
+	})
+
+	tests := []struct {
+		name             string
+		input            *templ.ComponentHandler
+		expectedStatus   int
+		expectedMIMEType string
+		expectedBody     string
+	}{
+		{
+			name:             "handlers return OK by default",
+			input:            templ.Handler(hello),
+			expectedStatus:   http.StatusOK,
+			expectedMIMEType: "text/html; charset=utf-8",
+			expectedBody:     "Hello",
+		},
+		{
+			name:             "handlers return OK by default",
+			input:            templ.Handler(templ.Raw(`♠ ‘ ♠ ‘`)),
+			expectedStatus:   http.StatusOK,
+			expectedMIMEType: "text/html; charset=utf-8",
+			expectedBody:     "♠ ‘ ♠ ‘",
+		},
+		{
+			name:             "handlers can be configured to return an alternative status code",
+			input:            templ.Handler(hello, templ.WithStatus(http.StatusNotFound)),
+			expectedStatus:   http.StatusNotFound,
+			expectedMIMEType: "text/html; charset=utf-8",
+			expectedBody:     "Hello",
+		},
+		{
+			name:             "handlers can be configured to return an alternative status code and content type",
+			input:            templ.Handler(hello, templ.WithStatus(http.StatusOK), templ.WithContentType("text/csv")),
+			expectedStatus:   http.StatusOK,
+			expectedMIMEType: "text/csv",
+			expectedBody:     "Hello",
+		},
+		{
+			name:             "handlers that fail return a 500 error",
+			input:            templ.Handler(errorComponent),
+			expectedStatus:   http.StatusInternalServerError,
+			expectedMIMEType: "text/plain; charset=utf-8",
+			expectedBody:     "templ: failed to render template\n",
+		},
+		{
+			name: "error handling can be customised",
+			input: templ.Handler(errorComponent, templ.WithErrorHandler(func(r *http.Request, err error) http.Handler {
+				// Because the error is received, it's possible to log the detail of the request.
+				// log.Printf("template render error for %v %v: %v", r.Method, r.URL.String(), err)
+				return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+					w.WriteHeader(http.StatusBadRequest)
+					if _, err := io.WriteString(w, "custom body"); err != nil {
+						t.Fatalf("failed to write string: %v", err)
+					}
+				})
+			})),
+			expectedStatus:   http.StatusBadRequest,
+			expectedMIMEType: "text/html; charset=utf-8",
+			expectedBody:     "custom body",
+		},
+	}
+	for _, tt := range tests {
+		tt := tt
+		t.Run(tt.name, func(t *testing.T) {
+			w := httptest.NewRecorder()
+			r := httptest.NewRequest("GET", "/test", nil)
+			tt.input.ServeHTTP(w, r)
+			if got := w.Result().StatusCode; tt.expectedStatus != got {
+				t.Errorf("expected status %d, got %d", tt.expectedStatus, got)
+			}
+			if mimeType := w.Result().Header.Get("Content-Type"); tt.expectedMIMEType != mimeType {
+				t.Errorf("expected content-type %s, got %s", tt.expectedMIMEType, mimeType)
+			}
+			body, err := io.ReadAll(w.Result().Body)
+			if err != nil {
+				t.Errorf("failed to read body: %v", err)
+			}
+			if diff := cmp.Diff(tt.expectedBody, string(body)); diff != "" {
+				t.Error(diff)
+			}
+		})
+	}
+
+	t.Run("streaming mode allows responses to be flushed", func(t *testing.T) {
+		w := httptest.NewRecorder()
+		r := httptest.NewRequest("GET", "/test", nil)
+
+		component := templ.ComponentFunc(func(ctx context.Context, w io.Writer) error {
+			// Write part 1.
+			if _, err := io.WriteString(w, "Part 1"); err != nil {
+				return err
+			}
+			// Flush.
+			if f, ok := w.(http.Flusher); ok {
+				f.Flush()
+			}
+			// Check partial response.
+			wr := w.(*httptest.ResponseRecorder)
+			actualBody := wr.Body.String()
+			if diff := cmp.Diff("Part 1", actualBody); diff != "" {
+				t.Error(diff)
+			}
+			// Write part 2.
+			if _, err := io.WriteString(w, "\nPart 2"); err != nil {
+				return err
+			}
+			return nil
+		})
+
+		templ.Handler(component, templ.WithStatus(http.StatusCreated), templ.WithStreaming()).ServeHTTP(w, r)
+		if got := w.Result().StatusCode; http.StatusCreated != got {
+			t.Errorf("expected status %d, got %d", http.StatusCreated, got)
+		}
+		if mimeType := w.Result().Header.Get("Content-Type"); "text/html; charset=utf-8" != mimeType {
+			t.Errorf("expected content-type %s, got %s", "text/html; charset=utf-8", mimeType)
+		}
+		body, err := io.ReadAll(w.Result().Body)
+		if err != nil {
+			t.Errorf("failed to read body: %v", err)
+		}
+		if diff := cmp.Diff("Part 1\nPart 2", string(body)); diff != "" {
+			t.Error(diff)
+		}
+	})
+	t.Run("streaming mode handles errors", func(t *testing.T) {
+		w := httptest.NewRecorder()
+		r := httptest.NewRequest("GET", "/test", nil)
+
+		expectedErr := errors.New("streaming error")
+
+		component := templ.ComponentFunc(func(ctx context.Context, w io.Writer) error {
+			if _, err := io.WriteString(w, "Body"); err != nil {
+				return err
+			}
+			return expectedErr
+		})
+
+		var errorHandlerCalled bool
+		errorHandler := func(r *http.Request, err error) http.Handler {
+			if expectedErr != err {
+				t.Errorf("expected error %v, got %v", expectedErr, err)
+			}
+			errorHandlerCalled = true
+			return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+				// This will be ignored, because the header has already been written.
+				w.WriteHeader(http.StatusBadRequest)
+				// This will be written, but will be appended to the written body.
+				if _, err := io.WriteString(w, "Error message"); err != nil {
+					t.Errorf("failed to write error message: %v", err)
+				}
+			})
+		}
+
+		h := templ.Handler(component,
+			templ.WithStatus(http.StatusCreated),
+			templ.WithStreaming(),
+			templ.WithErrorHandler(errorHandler),
+		)
+		h.ServeHTTP(w, r)
+
+		if !errorHandlerCalled {
+			t.Error("expected error handler to be called")
+		}
+		// Expect the status code to be 201, not 400, because in streaming mode,
+		// we have to write the header before we can call the error handler.
+		if actualRepsonseCode := w.Result().StatusCode; http.StatusCreated != actualRepsonseCode {
+			t.Errorf("expected status %d, got %d", http.StatusCreated, actualRepsonseCode)
+		}
+		// Expect the body to be "BodyError message", not just "Error message" because
+		// in streaming mode, we've already written part of the body to the response, unlike in
+		// standard mode where the body is written to a buffer before the response is written,
+		// ensuring that partial responses are not sent.
+		actualBody, err := io.ReadAll(w.Result().Body)
+		if err != nil {
+			t.Errorf("failed to read body: %v", err)
+		}
+		if diff := cmp.Diff("BodyError message", string(actualBody)); diff != "" {
+			t.Error(diff)
+		}
+	})
+}

runtime.go

@@ -82,74 +82,6 @@ func GetChildren(ctx context.Context) Component {
 	return *v.children
 }
 
-// ComponentHandler is a http.Handler that renders components.
-type ComponentHandler struct {
-	Component    Component
-	Status       int
-	ContentType  string
-	ErrorHandler func(r *http.Request, err error) http.Handler
-}
-
-const componentHandlerErrorMessage = "templ: failed to render template"
-
-// ServeHTTP implements the http.Handler interface.
-func (ch ComponentHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
-	// Since the component may error, write to a buffer first.
-	// This prevents partial responses from being written to the client.
-	buf := GetBuffer()
-	defer ReleaseBuffer(buf)
-	err := ch.Component.Render(r.Context(), buf)
-	if err != nil {
-		if ch.ErrorHandler != nil {
-			w.Header().Set("Content-Type", ch.ContentType)
-			ch.ErrorHandler(r, err).ServeHTTP(w, r)
-			return
-		}
-		http.Error(w, componentHandlerErrorMessage, http.StatusInternalServerError)
-		return
-	}
-	w.Header().Set("Content-Type", ch.ContentType)
-	if ch.Status != 0 {
-		w.WriteHeader(ch.Status)
-	}
-	// Ignore write error like http.Error() does, because there is
-	// no way to recover at this point.
-	_, _ = w.Write(buf.Bytes())
-}
-
-// Handler creates a http.Handler that renders the template.
-func Handler(c Component, options ...func(*ComponentHandler)) *ComponentHandler {
-	ch := &ComponentHandler{
-		Component:   c,
-		ContentType: "text/html; charset=utf-8",
-	}
-	for _, o := range options {
-		o(ch)
-	}
-	return ch
-}
-
-// WithStatus sets the HTTP status code returned by the ComponentHandler.
-func WithStatus(status int) func(*ComponentHandler) {
-	return func(ch *ComponentHandler) {
-		ch.Status = status
-	}
-}
-
-// WithContentType sets the Content-Type header returned by the ComponentHandler.
-func WithContentType(contentType string) func(*ComponentHandler) {
-	return func(ch *ComponentHandler) {
-		ch.ContentType = contentType
-	}
-}
-
-// WithErrorHandler sets the error handler used if rendering fails.
-func WithErrorHandler(eh func(r *http.Request, err error) http.Handler) func(*ComponentHandler) {
-	return func(ch *ComponentHandler) {
-		ch.ErrorHandler = eh
-	}
-}
-
 // EscapeString escapes HTML text within templates.
 func EscapeString(s string) string {
 	return html.EscapeString(s)
@@ -837,7 +769,7 @@ func ToGoHTML(ctx context.Context, c Component) (s template.HTML, err error) {
 // WriteWatchModeString is used when rendering templates in development mode.
 // the generator would have written non-go code to the _templ.txt file, which
 // is then read by this function and written to the output.
-func WriteWatchModeString(w *bytes.Buffer, lineNum int) error {
+func WriteWatchModeString(w io.Writer, lineNum int) error {
 	_, path, _, _ := runtime.Caller(1)
 	if !strings.HasSuffix(path, "_templ.go") {
 		return errors.New("templ: WriteWatchModeString can only be called from _templ.go")
@@ -857,7 +789,7 @@ func WriteWatchModeString(w *bytes.Buffer, lineNum int) error {
 	if err != nil {
 		return err
 	}
-	_, err = io.WriteString(io.Writer(w), unquoted)
+	_, err = io.WriteString(w, unquoted)
 	return err
 }
 

runtime/buffer.go

@@ -0,0 +1,62 @@
+package runtime
+
+import (
+	"bufio"
+	"io"
+	"net/http"
+)
+
+// DefaultBufferSize is the default size of buffers. It is set to 4KB by default, which is the
+// same as the default buffer size of bufio.Writer.
+var DefaultBufferSize = 4 * 1024 // 4KB
+
+// Buffer is a wrapper around bufio.Writer that enables flushing and closing of
+// the underlying writer.
+type Buffer struct {
+	Underlying io.Writer
+	b          *bufio.Writer
+}
+
+// Write the contents of p into the buffer.
+func (b *Buffer) Write(p []byte) (n int, err error) {
+	return b.b.Write(p)
+}
+
+// Flush writes any buffered data to the underlying io.Writer and
+// calls the Flush method of the underlying http.Flusher if it implements it.
+func (b *Buffer) Flush() error {
+	if err := b.b.Flush(); err != nil {
+		return err
+	}
+	if f, ok := b.Underlying.(http.Flusher); ok {
+		f.Flush()
+	}
+	return nil
+}
+
+// Close closes the buffer and the underlying io.Writer if it implements io.Closer.
+func (b *Buffer) Close() error {
+	if c, ok := b.Underlying.(io.Closer); ok {
+		return c.Close()
+	}
+	return nil
+}
+
+// Reset sets the underlying io.Writer to w and resets the buffer.
+func (b *Buffer) Reset(w io.Writer) {
+	if b.b == nil {
+		b.b = bufio.NewWriterSize(b, DefaultBufferSize)
+	}
+	b.Underlying = w
+	b.b.Reset(w)
+}
+
+// Size returns the size of the underlying buffer in bytes.
+func (b *Buffer) Size() int {
+	return b.b.Size()
+}
+
+// WriteString writes the contents of s into the buffer.
+func (b *Buffer) WriteString(s string) (n int, err error) {
+	return b.b.WriteString(s)
+}

runtime/buffer_test.go

@@ -0,0 +1,79 @@
+package runtime
+
+import (
+	"errors"
+	"net/http/httptest"
+	"testing"
+)
+
+var wasClosed bool
+
+type closable struct {
+	*httptest.ResponseRecorder
+}
+
+func (c *closable) Close() error {
+	wasClosed = true
+	return nil
+}
+
+func TestBuffer(t *testing.T) {
+	underlying := httptest.NewRecorder()
+	w, _ := GetBuffer(&closable{underlying})
+	t.Run("can write to a buffer", func(t *testing.T) {
+		if _, err := w.Write([]byte("A")); err != nil {
+			t.Errorf("unexpected error: %v", err)
+		}
+	})
+	t.Run("can write a string to a buffer", func(t *testing.T) {
+		if _, err := w.WriteString("A"); err != nil {
+			t.Errorf("unexpected error: %v", err)
+		}
+	})
+	t.Run("can flush a buffer", func(t *testing.T) {
+		if err := w.Flush(); err != nil {
+			t.Errorf("unexpected error: %v", err)
+		}
+	})
+	t.Run("can close a buffer", func(t *testing.T) {
+		if err := w.Close(); err != nil {
+			t.Errorf("unexpected error: %v", err)
+		}
+		if !wasClosed {
+			t.Error("expected the underlying writer to be closed")
+		}
+	})
+	t.Run("can get the size of a buffer", func(t *testing.T) {
+		if w.Size() != DefaultBufferSize {
+			t.Errorf("expected %d, got %d", DefaultBufferSize, w.Size())
+		}
+	})
+	t.Run("can reset a buffer", func(t *testing.T) {
+		w.Reset(underlying)
+	})
+	if underlying.Body.String() != "AA" {
+		t.Errorf("expected %q, got %q", "AA", underlying.Body.String())
+	}
+}
+
+type failStream struct {
+}
+
+var errTest = errors.New("test error")
+
+func (f *failStream) Write(p []byte) (n int, err error) {
+	return 0, errTest
+}
+
+func (f *failStream) Close() error {
+	return errTest
+}
+
+func TestBufferErrors(t *testing.T) {
+	w, _ := GetBuffer(&failStream{})
+	t.Run("close errors are returned", func(t *testing.T) {
+		if err := w.Close(); err != errTest {
+			t.Errorf("expected %v, got %v", errTest, err)
+		}
+	})
+}

runtime/bufferpool.go

@@ -0,0 +1,38 @@
+package runtime
+
+import (
+	"io"
+	"sync"
+)
+
+var bufferPool = sync.Pool{
+	New: func() any {
+		return new(Buffer)
+	},
+}
+
+// GetBuffer creates and returns a new buffer if the writer is not already a buffer,
+// or returns the existing buffer if it is.
+func GetBuffer(w io.Writer) (b *Buffer, existing bool) {
+	if w == nil {
+		return nil, false
+	}
+	b, ok := w.(*Buffer)
+	if ok {
+		return b, true
+	}
+	b = bufferPool.Get().(*Buffer)
+	b.Reset(w)
+	return b, false
+}
+
+// ReleaseBuffer flushes the buffer and returns it to the pool.
+func ReleaseBuffer(w io.Writer) (err error) {
+	b, ok := w.(*Buffer)
+	if !ok {
+		return nil
+	}
+	err = b.Flush()
+	bufferPool.Put(b)
+	return err
+}

runtime/bufferpool_test.go

@@ -0,0 +1,59 @@
+package runtime
+
+import (
+	"bytes"
+	"testing"
+)
+
+func TestBufferPool(t *testing.T) {
+	t.Run("can get a buffer from the pool", func(t *testing.T) {
+		w, existing := GetBuffer(new(bytes.Buffer))
+		if w == nil {
+			t.Error("expected a buffer, got nil")
+		}
+		if existing {
+			t.Error("expected a new buffer, got an existing buffer")
+		}
+		err := ReleaseBuffer(w)
+		if err != nil {
+			t.Errorf("unexpected error: %v", err)
+		}
+	})
+	t.Run("can get an existing buffer from the pool", func(t *testing.T) {
+		w, existing := GetBuffer(new(bytes.Buffer))
+		if w == nil {
+			t.Error("expected a buffer, got nil")
+		}
+		if existing {
+			t.Error("expected a new buffer, got an existing buffer")
+		}
+
+		w, existing = GetBuffer(w)
+		if w == nil {
+			t.Error("expected a buffer, got nil")
+		}
+		if !existing {
+			t.Error("expected an existing buffer, got a new buffer")
+		}
+
+		err := ReleaseBuffer(w)
+		if err != nil {
+			t.Errorf("unexpected error: %v", err)
+		}
+	})
+	t.Run("can release any writer without error", func(t *testing.T) {
+		err := ReleaseBuffer(new(bytes.Buffer))
+		if err != nil {
+			t.Errorf("unexpected error: %v", err)
+		}
+	})
+	t.Run("attempting to buffer a nil writer returns nil", func(t *testing.T) {
+		w, existing := GetBuffer(nil)
+		if w != nil {
+			t.Error("expected nil, got a buffer")
+		}
+		if existing {
+			t.Error("expected nil, got an existing buffer")
+		}
+	})
+}

runtime/builder.go

@@ -0,0 +1,8 @@
+package runtime
+
+import "strings"
+
+// GetBuilder returns a strings.Builder.
+func GetBuilder() (sb strings.Builder) {
+	return sb
+}

runtime/builder_test.go

@@ -0,0 +1,11 @@
+package runtime
+
+import "testing"
+
+func TestGetBuilder(t *testing.T) {
+	sb := GetBuilder()
+	sb.WriteString("test")
+	if sb.String() != "test" {
+		t.Errorf("expected \"test\", got %q", sb.String())
+	}
+}

runtime/runtime.go

@@ -1,29 +1,19 @@
 package runtime
 
 import (
-	"bytes"
 	"context"
 	"io"
 
 	"github.com/a-h/templ"
 )
 
-func WriterToBuffer(w io.Writer) (buf *bytes.Buffer, ok bool, release func()) {
-	buf, ok = w.(*bytes.Buffer)
-	if !ok {
-		buf = templ.GetBuffer()
-		return buf, false, func() {
-			templ.ReleaseBuffer(buf)
-		}
-	}
-	return buf, true, func() {}
-}
-
+// GeneratedComponentInput is used to avoid generated code needing to import the `context` and `io` packages.
 type GeneratedComponentInput struct {
 	Context context.Context
 	Writer  io.Writer
 }
 
+// GeneratedTemplate is used to avoid generated code needing to import the `context` and `io` packages.
 func GeneratedTemplate(f func(GeneratedComponentInput) error) templ.Component {
 	return templ.ComponentFunc(func(ctx context.Context, w io.Writer) error {
 		return f(GeneratedComponentInput{ctx, w})

runtime/runtime_test.go

@@ -0,0 +1,22 @@
+package runtime
+
+import (
+	"context"
+	"strings"
+	"testing"
+)
+
+func TestGeneratedTemplate(t *testing.T) {
+	f := func(input GeneratedComponentInput) error {
+		_, err := input.Writer.Write([]byte("Hello, World!"))
+		return err
+	}
+	sb := new(strings.Builder)
+	err := GeneratedTemplate(f).Render(context.Background(), sb)
+	if err != nil {
+		t.Errorf("unexpected error: %v", err)
+	}
+	if sb.String() != "Hello, World!" {
+		t.Errorf("expected \"Hello, World!\", got %q", sb.String())
+	}
+}

runtime_test.go

@@ -377,102 +377,6 @@ func TestClassesFunction(t *testing.T) {
 	}
 }
 
-func TestHandler(t *testing.T) {
-	hello := templ.ComponentFunc(func(ctx context.Context, w io.Writer) error {
-		if _, err := io.WriteString(w, "Hello"); err != nil {
-			t.Fatalf("failed to write string: %v", err)
-		}
-		return nil
-	})
-	errorComponent := templ.ComponentFunc(func(ctx context.Context, w io.Writer) error {
-		if _, err := io.WriteString(w, "Hello"); err != nil {
-			t.Fatalf("failed to write string: %v", err)
-		}
-		return errors.New("handler error")
-	})
-
-	tests := []struct {
-		name             string
-		input            *templ.ComponentHandler
-		expectedStatus   int
-		expectedMIMEType string
-		expectedBody     string
-	}{
-		{
-			name:             "handlers return OK by default",
-			input:            templ.Handler(hello),
-			expectedStatus:   http.StatusOK,
-			expectedMIMEType: "text/html; charset=utf-8",
-			expectedBody:     "Hello",
-		},
-		{
-			name:             "handlers return OK by default",
-			input:            templ.Handler(templ.Raw(`♠ ‘ ♠ ‘`)),
-			expectedStatus:   http.StatusOK,
-			expectedMIMEType: "text/html; charset=utf-8",
-			expectedBody:     "♠ ‘ ♠ ‘",
-		},
-		{
-			name:             "handlers can be configured to return an alternative status code",
-			input:            templ.Handler(hello, templ.WithStatus(http.StatusNotFound)),
-			expectedStatus:   http.StatusNotFound,
-			expectedMIMEType: "text/html; charset=utf-8",
-			expectedBody:     "Hello",
-		},
-		{
-			name:             "handlers can be configured to return an alternative status code and content type",
-			input:            templ.Handler(hello, templ.WithStatus(http.StatusOK), templ.WithContentType("text/csv")),
-			expectedStatus:   http.StatusOK,
-			expectedMIMEType: "text/csv",
-			expectedBody:     "Hello",
-		},
-		{
-			name:             "handlers that fail return a 500 error",
-			input:            templ.Handler(errorComponent),
-			expectedStatus:   http.StatusInternalServerError,
-			expectedMIMEType: "text/plain; charset=utf-8",
-			expectedBody:     "templ: failed to render template\n",
-		},
-		{
-			name: "error handling can be customised",
-			input: templ.Handler(errorComponent, templ.WithErrorHandler(func(r *http.Request, err error) http.Handler {
-				// Because the error is received, it's possible to log the detail of the request.
-				// log.Printf("template render error for %v %v: %v", r.Method, r.URL.String(), err)
-				return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-					w.WriteHeader(http.StatusBadRequest)
-					if _, err := io.WriteString(w, "custom body"); err != nil {
-						t.Fatalf("failed to write string: %v", err)
-					}
-				})
-			})),
-			expectedStatus:   http.StatusBadRequest,
-			expectedMIMEType: "text/html; charset=utf-8",
-			expectedBody:     "custom body",
-		},
-	}
-	for _, tt := range tests {
-		tt := tt
-		t.Run(tt.name, func(t *testing.T) {
-			w := httptest.NewRecorder()
-			r := httptest.NewRequest("GET", "/test", nil)
-			tt.input.ServeHTTP(w, r)
-			if got := w.Result().StatusCode; tt.expectedStatus != got {
-				t.Errorf("expected status %d, got %d", tt.expectedStatus, got)
-			}
-			if mimeType := w.Result().Header.Get("Content-Type"); tt.expectedMIMEType != mimeType {
-				t.Errorf("expected content-type %s, got %s", tt.expectedMIMEType, mimeType)
-			}
-			body, err := io.ReadAll(w.Result().Body)
-			if err != nil {
-				t.Errorf("failed to read body: %v", err)
-			}
-			if diff := cmp.Diff(tt.expectedBody, string(body)); diff != "" {
-				t.Error(diff)
-			}
-		})
-	}
-}
-
 func TestRenderScriptItems(t *testing.T) {
 	s1 := templ.ComponentScript{
 		Name:     "s1",

turbo/stream_templ.go

@@ -10,8 +10,15 @@ import templruntime "github.com/a-h/templ/runtime"
 func actionTemplate(action string, target string) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var1 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var1 == nil {
@@ -56,9 +63,6 @@ func actionTemplate(action string, target string) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }
@@ -66,8 +70,15 @@ func actionTemplate(action string, target string) templ.Component {
 func removeTemplate(action string, target string) templ.Component {
 	return templruntime.GeneratedTemplate(func(templ_7745c5c3_Input templruntime.GeneratedComponentInput) (templ_7745c5c3_Err error) {
 		templ_7745c5c3_W, ctx := templ_7745c5c3_Input.Writer, templ_7745c5c3_Input.Context
-		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer, templ_7745c5c3_Release := templruntime.WriterToBuffer(templ_7745c5c3_W)
-		defer templ_7745c5c3_Release()
+		templ_7745c5c3_Buffer, templ_7745c5c3_IsBuffer := templruntime.GetBuffer(templ_7745c5c3_W)
+		if !templ_7745c5c3_IsBuffer {
+			defer func() {
+				templ_7745c5c3_BufErr := templruntime.ReleaseBuffer(templ_7745c5c3_Buffer)
+				if templ_7745c5c3_Err == nil {
+					templ_7745c5c3_Err = templ_7745c5c3_BufErr
+				}
+			}()
+		}
 		ctx = templ.InitializeContext(ctx)
 		templ_7745c5c3_Var4 := templ.GetChildren(ctx)
 		if templ_7745c5c3_Var4 == nil {
@@ -104,9 +115,6 @@ func removeTemplate(action string, target string) templ.Component {
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		if !templ_7745c5c3_IsBuffer {
-			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteTo(templ_7745c5c3_W)
-		}
 		return templ_7745c5c3_Err
 	})
 }