iframe-activeelement-after-focusing-out-iframes-inner.html

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>iframe active element inner document</title>
</head>
<body>
<h1>Inner</h1><br>
<input></input>
<script>
let innerlog = "innerlog:";

window.onmessage = function(e) {
  if (e.data == "getlog") {
    parent.postMessage(innerlog, "*");
  }
};

window.onfocus = function() {
  innerlog += "windowfocus,";
};

window.onblur = function() {
  innerlog += "windowblur,";
  innerlog += "activeElement:" + document.activeElement.tagName + ",";
};

let input = document.querySelector("input");
window.onload = function() {
  innerlog += "willfocusinput,";
  input.focus();
  innerlog += "didfocusinput,";
  innerlog += "activeElement:" + document.activeElement.tagName + ",";
  parent.postMessage("ready", "*");
};
</script>
</body>
</html>

chromium/third_party/blink/web_tests/external/wpt/focus/support/iframe-activeelement-after-focusing-out-iframes-inner.html