anchor-frames-shifting-focus.html | Explore in Territory

<!DOCTYPE html>
<style>
iframe {
  position: absolute;
  top: 50px;
  width: 100px;
  height: 100px;
  border: 1px solid black;
}
::-webkit-scrollbar {
  width: 0px;
}
</style>
<div style='width:10px;height:2000px;background:white;position:absolute'></div>
<iframe src='http://127.0.0.1:8000/navigation/resources/focus-shifting-frame-with-anchor.html' sandbox='allow-scripts'></iframe>
<script>

if (window.testRunner) {
  testRunner.waitUntilDone();
}

onload = function() {
  if (window.eventSender) {
    // Give the frame user gesture to make sure 'focus' API works.
    const iframe = document.querySelector("iframe");
    iframe.contentWindow.postMessage("click-body", "*");
  }
};

onmessage = function(e) {
   if (e.data === "reply") {
    // By placing the rAF call inside the message handler, we are guaranteed
    // that the subframe has completed its rAF call before we get to this point.
    requestAnimationFrame(function() {
      if (window.testRunner) {
        testRunner.notifyDone();
      }
    });
  }
};
</script>

chromium/third_party/blink/web_tests/http/tests/navigation/anchor-frames-shifting-focus.html