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<!doctype html>
<meta charset="utf-8">
<title>Focus test middle document</title>
<h1>Middle</h1><br>
<iframe src="https://{{hosts[][www]}}:{{ports[https][0]}}/focus/support/activeelement-after-calling-window-focus-inner.html"></iframe>
<script>
let middlelog = "middlelog:";

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

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

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