From 37d074109957e5d4c49c89ff69d39362ce729d8c Mon Sep 17 00:00:00 2001
From: Sam Atkins <sam@ladybird.org>
Date: Thu, 27 Nov 2025 09:54:47 +0000
Subject: [PATCH] LibWeb/HTML: Implement HTMLTemplateElement.content to spec

No real behaviour change - it just means we VERIFY before returning the
value we returned before.
---
 Libraries/LibWeb/HTML/HTMLTemplateElement.cpp | 10 ++++++++++
 Libraries/LibWeb/HTML/HTMLTemplateElement.h   |  2 ++
 Libraries/LibWeb/HTML/HTMLTemplateElement.idl |  2 +-
 3 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/Libraries/LibWeb/HTML/HTMLTemplateElement.cpp b/Libraries/LibWeb/HTML/HTMLTemplateElement.cpp
index c3de44efe2c..8d705de62dd 100644
--- a/Libraries/LibWeb/HTML/HTMLTemplateElement.cpp
+++ b/Libraries/LibWeb/HTML/HTMLTemplateElement.cpp
@@ -76,6 +76,16 @@ WebIDL::ExceptionOr<void> HTMLTemplateElement::cloned(Node& copy, bool subtree)
     return {};
 }
 
+// https://html.spec.whatwg.org/multipage/scripting.html#dom-template-content
+GC::Ref<DOM::DocumentFragment> HTMLTemplateElement::content_for_bindings() const
+{
+    // 1. Assert: this's template contents is not a ShadowRoot node.
+    VERIFY(!m_content->is_shadow_root());
+
+    // 2. Return this's template contents.
+    return *m_content;
+}
+
 void HTMLTemplateElement::set_template_contents(GC::Ref<DOM::DocumentFragment> contents)
 {
     m_content = contents;
diff --git a/Libraries/LibWeb/HTML/HTMLTemplateElement.h b/Libraries/LibWeb/HTML/HTMLTemplateElement.h
index 9b5f910ba7c..5a0dfbcc9ff 100644
--- a/Libraries/LibWeb/HTML/HTMLTemplateElement.h
+++ b/Libraries/LibWeb/HTML/HTMLTemplateElement.h
@@ -21,6 +21,8 @@ public:
     GC::Ref<DOM::DocumentFragment> content() { return *m_content; }
     GC::Ref<DOM::DocumentFragment> const content() const { return *m_content; }
 
+    GC::Ref<DOM::DocumentFragment> content_for_bindings() const;
+
     void set_template_contents(GC::Ref<DOM::DocumentFragment>);
 
     virtual void adopted_from(DOM::Document&) override;
diff --git a/Libraries/LibWeb/HTML/HTMLTemplateElement.idl b/Libraries/LibWeb/HTML/HTMLTemplateElement.idl
index 3301ba68d05..49d24a7c499 100644
--- a/Libraries/LibWeb/HTML/HTMLTemplateElement.idl
+++ b/Libraries/LibWeb/HTML/HTMLTemplateElement.idl
@@ -7,7 +7,7 @@ interface HTMLTemplateElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    readonly attribute DocumentFragment content;
+    [ImplementedAs=content_for_bindings] readonly attribute DocumentFragment content;
     [Reflect=shadowrootmode, Enumerated=ShadowRootMode, CEReactions] attribute DOMString shadowRootMode;
     [Reflect=shadowrootdelegatesfocus, CEReactions] attribute boolean shadowRootDelegatesFocus;
     [Reflect=shadowrootclonable, CEReactions] attribute boolean shadowRootClonable;