PictureInPictureWindow: resize event

<p>Resize the floating video window to fire the <code>resize</code> event.</p>
<p>Window height: <span id="height"></span></p>
<p>Window width: <span id="width"></span></p>
<video id="video" src="" muted autoplay></video>

const video = document.querySelector('#video');
const heightOutput = document.querySelector('#height');
const widthOutput = document.querySelector('#width');

function resize(evt) {
  heightOutput.textContent = evt.target.width;
  widthOutput.textContent = evt.target.width;
}

video.requestPictureInPicture()
  .then(pictureInPictureWindow => {
    pictureInPictureWindow.onresize = resize;
  });

pictureInPictureWindow.addEventListener('resize', resize);