From 84a44957233c13fb21f5d97b06db1d89076fb144 Mon Sep 17 00:00:00 2001
From: Anne van Kesteren <annevk@annevk.nl>
Date: Fri, 22 Feb 2019 11:01:20 +0100
Subject: [PATCH] HTML: window.focus() sans browsing context

For https://github.com/whatwg/html/pull/4377.
---
 html/browsers/the-window-object/focus.window.js | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100644 html/browsers/the-window-object/focus.window.js

diff --git a/html/browsers/the-window-object/focus.window.js b/html/browsers/the-window-object/focus.window.js
new file mode 100644
index 00000000000000..6ec7feee281e75
--- /dev/null
+++ b/html/browsers/the-window-object/focus.window.js
@@ -0,0 +1,15 @@
+async_test(t => {
+  const input = document.body.appendChild(document.createElement("input"));
+  input.onfocus = t.step_func(() => {
+    const frame = document.body.appendChild(document.createElement("iframe")),
+          frameW = frame.contentWindow;
+    frameW.onfocus = t.unreached_func();
+    frame.remove();
+    frameW.focus();
+    t.step_timeout(() => {
+      assert_equals(document.activeElement, input);
+      t.done();
+    }, 100);
+  });
+  input.focus();
+});