codeRunner.js

module.exports = class HtmlCodeRunner {
  async run({ code, waitForResult, timeout }) {
    const { port1, port2 } = new MessageChannel();
    // .querySelector('#previewWorkerManagerFrame')
    this.elem.contentWindow.postMessage(
      {
        command,
        sandbox,
        waitForResult,
        timeout,
      },
      '*',
      [port2]
    );

  }
}