<html>
<style>
* {
  width: 100%;
  height: 100%;
  margin: 0;
}
</style>
<body>
<webview id="webview" nodeintegration disableguestresize src="resize.html"/>
</body>
<script type="text/javascript" charset="utf-8">
  const {ipcRenderer} = require('electron')

  const webview = document.getElementById('webview')
  webview.addEventListener('resize', event => {
    ipcRenderer.send('webview-element-resize', event.newWidth, event.newHeight)
  }, false)
</script>
</html>