Implement ParentNode#replaceChildren

components/script/dom/document.rs

@@ -4753,6 +4753,11 @@ impl DocumentMethods for Document {
         self.upcast::<Node>().append(nodes)
     }
 
+    // https://dom.spec.whatwg.org/#dom-parentnode-replacechildren
+    fn ReplaceChildren(&self, nodes: Vec<NodeOrString>) -> ErrorResult {
+        self.upcast::<Node>().replace_children(nodes)
+    }
+
     // https://dom.spec.whatwg.org/#dom-parentnode-queryselector
     fn QuerySelector(&self, selectors: DOMString) -> Fallible<Option<DomRoot<Element>>> {
         let root = self.upcast::<Node>();

components/script/dom/documentfragment.rs

@@ -100,6 +100,11 @@ impl DocumentFragmentMethods for DocumentFragment {
         self.upcast::<Node>().append(nodes)
     }
 
+    // https://dom.spec.whatwg.org/#dom-parentnode-replacechildren
+    fn ReplaceChildren(&self, nodes: Vec<NodeOrString>) -> ErrorResult {
+        self.upcast::<Node>().replace_children(nodes)
+    }
+
     // https://dom.spec.whatwg.org/#dom-parentnode-queryselector
     fn QuerySelector(&self, selectors: DOMString) -> Fallible<Option<DomRoot<Element>>> {
         self.upcast::<Node>().query_selector(selectors)

components/script/dom/element.rs

@@ -2637,6 +2637,11 @@ impl ElementMethods for Element {
         self.upcast::<Node>().append(nodes)
     }
 
+    // https://dom.spec.whatwg.org/#dom-parentnode-replacechildren
+    fn ReplaceChildren(&self, nodes: Vec<NodeOrString>) -> ErrorResult {
+        self.upcast::<Node>().replace_children(nodes)
+    }
+
     // https://dom.spec.whatwg.org/#dom-parentnode-queryselector
     fn QuerySelector(&self, selectors: DOMString) -> Fallible<Option<DomRoot<Element>>> {
         let root = self.upcast::<Node>();

components/script/dom/node.rs

@@ -934,6 +934,18 @@ impl Node {
         self.AppendChild(&node).map(|_| ())
     }
 
+    // https://dom.spec.whatwg.org/#dom-parentnode-replacechildren
+    pub fn replace_children(&self, nodes: Vec<NodeOrString>) -> ErrorResult {
+        // Step 1.
+        let doc = self.owner_doc();
+        let node = doc.node_from_nodes_and_strings(nodes)?;
+        // Step 2.
+        Node::ensure_pre_insertion_validity(&node, self, None)?;
+        // Step 3.
+        Node::replace_all(Some(&node), self);
+        Ok(())
+    }
+
     // https://dom.spec.whatwg.org/#dom-parentnode-queryselector
     pub fn query_selector(&self, selectors: DOMString) -> Fallible<Option<DomRoot<Element>>> {
         // Step 1.

components/script/dom/webidls/ParentNode.webidl

@@ -20,6 +20,8 @@ interface mixin ParentNode {
   void prepend((Node or DOMString)... nodes);
   [CEReactions, Throws, Unscopable]
   void append((Node or DOMString)... nodes);
+  [CEReactions, Throws, Unscopable]
+  void replaceChildren((Node or DOMString)... nodes);
 
   [Pure, Throws]
   Element? querySelector(DOMString selectors);

tests/wpt/metadata/dom/idlharness.window.js.ini

@@ -716,18 +716,6 @@
   [Element interface: operation before((Node or DOMString)...)]
     expected: FAIL
 
-  [Element interface: element must inherit property "replaceChildren((Node or DOMString)...)" with the proper type]
-    expected: FAIL
-
-  [Document interface: calling replaceChildren((Node or DOMString)...) on xmlDoc with too few arguments must throw TypeError]
-    expected: FAIL
-
-  [Document interface: calling replaceChildren((Node or DOMString)...) on new Document() with too few arguments must throw TypeError]
-    expected: FAIL
-
-  [DocumentFragment interface: document.createDocumentFragment() must inherit property "replaceChildren((Node or DOMString)...)" with the proper type]
-    expected: FAIL
-
   [DocumentFragment interface: operation replaceChildren((Node or DOMString)...)]
     expected: FAIL
 
@@ -737,18 +725,6 @@
   [Document interface: operation replaceChildren((Node or DOMString)...)]
     expected: FAIL
 
-  [Element interface: calling replaceChildren((Node or DOMString)...) on element with too few arguments must throw TypeError]
-    expected: FAIL
-
-  [Document interface: new Document() must inherit property "replaceChildren((Node or DOMString)...)" with the proper type]
-    expected: FAIL
-
-  [DocumentFragment interface: calling replaceChildren((Node or DOMString)...) on document.createDocumentFragment() with too few arguments must throw TypeError]
-    expected: FAIL
-
-  [Document interface: xmlDoc must inherit property "replaceChildren((Node or DOMString)...)" with the proper type]
-    expected: FAIL
-
   [XPathNSResolver interface: document.createNSResolver(document.body) must inherit property "lookupNamespaceURI(DOMString?)" with the proper type]
     expected: FAIL
 

tests/wpt/metadata/dom/nodes/ParentNode-replaceChildren.html.ini

@@ -1,76 +0,0 @@
-[ParentNode-replaceChildren.html]
-  [DocumentFragment.replaceChildren() with null as an argument, on a parent having a child.]
-    expected: FAIL
-
-  [DocumentFragment.replaceChildren() with only text as an argument, on a parent having no child.]
-    expected: FAIL
-
-  [Element.replaceChildren() with null as an argument, on a parent having no child.]
-    expected: FAIL
-
-  [Element.replaceChildren() without any argument, on a parent having no child.]
-    expected: FAIL
-
-  [If node is a host-including inclusive ancestor of parent, then throw a HierarchyRequestError DOMException.]
-    expected: FAIL
-
-  [If node is an Element and parent is a document with another element, then throw a HierarchyRequestError DOMException.]
-    expected: FAIL
-
-  [DocumentFragment.replaceChildren() with null as an argument, on a parent having no child.]
-    expected: FAIL
-
-  [DocumentFragment.replaceChildren() with one element and text as argument, on a parent having a child.]
-    expected: FAIL
-
-  [Element.replaceChildren() with null as an argument, on a parent having a child.]
-    expected: FAIL
-
-  [DocumentFragment.replaceChildren() with only one element as an argument, on a parent having no child.]
-    expected: FAIL
-
-  [Element.replaceChildren() should move nodes in the right order]
-    expected: FAIL
-
-  [If node is a Text node and parent is a document, then throw a HierarchyRequestError DOMException.]
-    expected: FAIL
-
-  [If node is a DocumentFragment with an element and parent is a document with another element, then throw a HierarchyRequestError DOMException.]
-    expected: FAIL
-
-  [DocumentFragment.replaceChildren() with undefined as an argument, on a parent having no child.]
-    expected: FAIL
-
-  [If node is a doctype and parent is not a document, then throw a HierarchyRequestError DOMException.]
-    expected: FAIL
-
-  [If node is a doctype and parent is a document with another doctype, then throw a HierarchyRequestError DOMException.]
-    expected: FAIL
-
-  [If node is a DocumentFragment with multiple elements and parent is a document, then throw a HierarchyRequestError DOMException.]
-    expected: FAIL
-
-  [Element.replaceChildren() with undefined as an argument, on a parent having no child.]
-    expected: FAIL
-
-  [Element.replaceChildren() with only one element as an argument, on a parent having no child.]
-    expected: FAIL
-
-  [Element.replaceChildren() with one element and text as argument, on a parent having a child.]
-    expected: FAIL
-
-  [DocumentFragment.replaceChildren() should move nodes in the right order]
-    expected: FAIL
-
-  [If node is a doctype and parent is a document with an element, then throw a HierarchyRequestError DOMException.]
-    expected: FAIL
-
-  [Element.replaceChildren() with only text as an argument, on a parent having no child.]
-    expected: FAIL
-
-  [DocumentFragment.replaceChildren() without any argument, on a parent having no child.]
-    expected: FAIL
-
-  [If node is not a DocumentFragment, DocumentType, Element, Text, ProcessingInstruction, or Comment node, then throw a HierarchyRequestError DOMException.]
-    expected: FAIL
-