fix: webview.focus() should move page focus to webview (#14428)

lib/renderer/web-view/web-view.js

@@ -366,6 +366,11 @@ const registerWebViewElement = function () {
     return internal.webContents
   }
 
+  // Focusing the webview should move page focus to the underlying iframe.
+  proto.focus = function () {
+    this.contentWindow.focus()
+  }
+
   window.WebView = webFrame.registerEmbedderCustomElement('webview', {
     prototype: proto
   })

spec/webview-spec.js

@@ -1291,8 +1291,9 @@ describe('<webview> tag', function () {
 
       await domReadySignal
 
+      // If this test fails, check if webview.focus() still works.
       const focusSignal = waitForEvent(webview, 'focus')
-      webview.contentWindow.focus()
+      webview.focus()
 
       await focusSignal
     })