如何等待断言一个元素永远不会出现在文档中？

function waitForElementNotToExist(selector, timeout) {
  return new Promise((resolve, reject) => {
    const startTime = Date.now();
    const interval = setInterval(() => {
      const element = document.querySelector(selector);
      if (!element) {
        clearInterval(interval);
        resolve();
      } else if (Date.now() - startTime > timeout) {
        clearInterval(interval);
        reject(new Error(`Element ${selector} still exists after ${timeout}ms`));
      }
    }, 100);
  });
}

// 使用示例
waitForElementNotToExist('.my-element', 5000)
  .then(() => {
    console.log('Element does not exist');
  })
  .catch((error) => {
    console.error(error);
  });