electron/spec/fixtures/crash-cases/webview-remove-on-wc-close/index.html

<button id="closeBtn">close webview</button>
<webview id="webview" src="webview.html"></webview>
<script>
  webview.onclose = () => webview.remove()
  closeBtn.onclick = () => webview.executeJavaScript('window.close()', true)
</script>