chromium/third_party/blink/web_tests/external/wpt/focus/support/activeelement-after-calling-window-focus-outer-same.sub.html

<!doctype html>
<meta charset="utf-8">
<title>Focus test outer document</title>
<iframe src="https://{{hosts[][www]}}:{{ports[https][0]}}/focus/support/activeelement-after-calling-window-focus-middle.sub.html"></iframe>
<script>
let outerlog = "outerlog:";

let iframe = document.querySelector("iframe");
window.onmessage = function(e) {
  if (e.data == "ready") {
    opener.postMessage(e.data, "*");
  } else if (e.data == "start") {
    window.onfocus = function() {
      outerlog += "windowfocus,";
    };
  } else if (e.data == "focusinnerinput" || e.data == "focusinner" || e.data == "focusmiddle" || e.data == "getlog") {
    iframe.contentWindow.postMessage(e.data, "*");
  } else if (e.data == "focusouter") {
    window.focus();
    outerlog += document.activeElement.tagName + ",";
  } else {
    opener.postMessage(outerlog + e.data, "*");
  }
};

window.onblur = function() {
  outerlog += "windowblur,";
};
</script>