Implement 'do nothing' methods on Window and Document

components/script/dom/document.rs

@@ -1911,12 +1911,27 @@ impl<'a> DocumentMethods for &'a Document {
         collection.r().reflector().get_jsobject().get()
     }
 
-    // https://html.spec.whatwg.org/#document
+    // https://html.spec.whatwg.org/multipage/#document
     fn SupportedPropertyNames(self) -> Vec<DOMString> {
         // FIXME: unimplemented (https://github.com/servo/servo/issues/7273)
         vec![]
     }
 
+    // https://html.spec.whatwg.org/multipage/#dom-document-clear
+    fn Clear(self) {
+        // This method intentionally does nothing
+    }
+
+    // https://html.spec.whatwg.org/multipage/#dom-document-captureevents
+    fn CaptureEvents(self) {
+        // This method intentionally does nothing
+    }
+
+    // https://html.spec.whatwg.org/#dom-document-releaseevents
+    fn ReleaseEvents(self) {
+        // This method intentionally does nothing
+    }
+
     global_event_handlers!();
     event_handler!(readystatechange, GetOnreadystatechange, SetOnreadystatechange);
 }

components/script/dom/webidls/Document.webidl

@@ -146,9 +146,9 @@ partial interface Document {
   [SameObject]
   readonly attribute HTMLCollection applets;
 
-  // void clear();
-  // void captureEvents();
-  // void releaseEvents();
+  void clear();
+  void captureEvents();
+  void releaseEvents();
 
   // Tracking issue for document.all: https://github.com/servo/servo/issues/7396
   // readonly attribute HTMLAllCollection all;

components/script/dom/webidls/Window.webidl

@@ -93,6 +93,12 @@ partial interface Window {
   /*[Replaceable]*/ readonly attribute Performance performance;
 };
 
+// https://html.spec.whatwg.org/multipage/#Window-partial
+partial interface Window {
+  void captureEvents();
+  void releaseEvents();
+};
+
 // https://drafts.csswg.org/cssom/#extensions-to-the-window-interface
 partial interface Window {
    [NewObject]

components/script/dom/window.rs

@@ -542,6 +542,16 @@ impl<'a> WindowMethods for &'a Window {
         doc.r().cancel_animation_frame(ident);
     }
 
+    // https://html.spec.whatwg.org/multipage/#dom-window-captureevents
+    fn CaptureEvents(self) {
+        // This method intentionally does nothing
+    }
+
+    // https://html.spec.whatwg.org/multipage/#dom-window-releaseevents
+    fn ReleaseEvents(self) {
+        // This method intentionally does nothing
+    }
+
     // check-tidy: no specs after this line
     fn Debug(self, message: DOMString) {
         debug!("{}", message);