child-message-event-api.html | Explore in Territory

<!DOCTYPE html>
<body style="background: red;">
  <script>
    window.parent.postMessage("child-loaded",
                              {targetOrigin: "*", includeUserActivation: true});
    window.addEventListener("click", event => {
      window.parent.postMessage("child-clicked",
                                {targetOrigin: "*", includeUserActivation: true});
      var win = window.open('404.html');
      win.close();
    });

    window.addEventListener("message", event => {
      if (event.data == "report") {
        window.parent.postMessage("child-report",
                                  {targetOrigin: "*", includeUserActivation: true});
      }
      if (event.data == "report-no-activation") {
        window.parent.postMessage("child-report-no-activation",
                                  {targetOrigin: "*", includeUserActivation: false});
      }
    });
  </script>
</body>

chromium/third_party/blink/web_tests/external/wpt/html/user-activation/resources/child-message-event-api.html