Function ensureOverlayExists

client-src/overlay.js:550–569

* @param {(element: HTMLDivElement) => void} callback callback * @param {string | false | undefined} trustedTypesPolicyName trusted types policy name

(callback, trustedTypesPolicyName)

   * @param {string | false | undefined} trustedTypesPolicyName trusted types policy name
   */
  function ensureOverlayExists(callback, trustedTypesPolicyName) {
    if (containerElement) {
      // @ts-expect-error https://github.com/microsoft/TypeScript/issues/30024
      containerElement.innerHTML = overlayTrustedTypesPolicy
        ? overlayTrustedTypesPolicy.createHTML("")
        : "";
      // Everything is ready, call the callback right away.
      callback(containerElement);

      return;
    }

    onLoadQueue.push(callback);

    if (iframeContainerElement) {
      return;
    }

    createContainer(trustedTypesPolicyName);
  }

  // Successful compilation.
  /**