diff --git a/cmd/wasm/components.go b/cmd/wasm/components.go
index 39f0685..a982d52 100644
--- a/cmd/wasm/components.go
+++ b/cmd/wasm/components.go
@@ -8,7 +8,8 @@ import (
 
 var canonicalSlotOrder = []string{"H", "L", "C", "R", "F"}
 
-// isValidCustomElementTag reports whether tag is a safe custom element name.
+// cmd/wasm/components.go: isValidCustomElementTag reports whether tag is a safe
+// custom element name.
 // It mirrors the codegen package validation without importing the heavier
 // template and logging dependencies into the WASM-linked path.
 func isValidCustomElementTag(tag string) bool {
@@ -33,8 +34,9 @@ func isValidCustomElementTag(tag string) bool {
 	return true
 }
 
-// tagToClassName converts a kebab-case tag into a PascalCase class name.
-// Example: nav-bar -> NavBar.
+// cmd/wasm/components.go: tagToClassName converts a kebab-case tag into a
+// PascalCase class name.
+// Example: tagToClassName("nav-bar") returns NavBar.
 func tagToClassName(tag string) string {
 	var b strings.Builder
 	for part := range strings.SplitSeq(tag, "-") {
@@ -47,20 +49,21 @@ func tagToClassName(tag string) string {
 	return b.String()
 }
 
-// jsStringLiteral returns a quoted JavaScript string literal.
+// cmd/wasm/components.go: jsStringLiteral returns a quoted JavaScript string literal.
 func jsStringLiteral(s string) string {
 	return strconv.Quote(s)
 }
 
-// customElementClassSource returns a JavaScript class expression that mirrors
-// the codegen bundle's closed-shadow custom element behaviour.
+// cmd/wasm/components.go: customElementClassSource returns a JavaScript class
+// expression that mirrors the codegen bundle's closed-shadow custom element
+// behaviour.
 func customElementClassSource(tag, slot string) string {
 	className := tagToClassName(tag)
 	return "class " + className + " extends HTMLElement {" +
-		"constructor(){super();this._shadow=this.attachShadow({mode:\"closed\"});}" +
-		"connectedCallback(){this._shadow.textContent=\"\";const slot=this.getAttribute(\"data-slot\")||" + jsStringLiteral(slot) + ";" +
+		"constructor(){super();this.#shadow=this.attachShadow({mode:\"closed\"});}" +
+		"connectedCallback(){this.#shadow.textContent=\"\";const slot=this.getAttribute(\"data-slot\")||" + jsStringLiteral(slot) + ";" +
 		"this.dispatchEvent(new CustomEvent(\"wc-ready\",{detail:{tag:" + jsStringLiteral(tag) + ",slot}}));}" +
 		"render(html){const tpl=document.createElement(\"template\");tpl.insertAdjacentHTML(\"afterbegin\",html);" +
-		"this._shadow.textContent=\"\";this._shadow.appendChild(tpl.content.cloneNode(true));}" +
+		"this.#shadow.textContent=\"\";this.#shadow.appendChild(tpl.content.cloneNode(true));}" +
 		"}"
 }
diff --git a/cmd/wasm/register_test.go b/cmd/wasm/register_test.go
index 40bcb71..0dfc025 100644
--- a/cmd/wasm/register_test.go
+++ b/cmd/wasm/register_test.go
@@ -64,6 +64,7 @@ func TestCustomElementClassSource(t *testing.T) {
 
 	assert.Contains(t, src, `class NavBar extends HTMLElement`)
 	assert.Contains(t, src, `mode:"closed"`)
+	assert.Contains(t, src, `#shadow`)
 	assert.Contains(t, src, `data-slot`)
 	assert.Contains(t, src, `wc-ready`)
 	assert.Contains(t, src, `nav-bar`)