<!DOCTYPE html>
<style>
  video {
    appearance: push-button;
  }
</style>
<script>
  onerror = () => {
      document.execCommand('InsertOrderedList');
  };
  document.onbeforeinput = () => {
    document.execCommand('FontSizeDelta', false, '2');
  };
  onload = () => {
    document.body.append('a');
    let video0 = document.createElement('video');
    video0.controls = true;
    document.body.appendChild(video0);
    document.designMode = 'on';
    document.body.appendChild(document.createElement('input'));
    document.execCommand('SelectAll');
    document.execCommand('InsertText', false, '');
    if (window.testRunner)
        testRunner.dumpAsText();
    console.log("This test passes if it does not crash.");
  };
</script>