iframe-lock-helper.html | Explore in Territory

<!DOCTYPE html>
<script>
'use strict';

window.onmessage = message => {
  if (message.data === 'Ready') {
    let onSuccess = () => { parent.postMessage('Failure', '*'); };
    let onError = error => {
      if (error.name == 'InvalidStateError') {
        parent.postMessage('Success', '*');
      } else {
        parent.postMessage('Failure', '*');
      }
    };

    navigator.keyboard.lock().then(onSuccess, onError);
  }
};

</script>

chromium/third_party/blink/web_tests/external/wpt/keyboard-lock/resources/iframe-lock-helper.html