前端项目部署后如何实现自动更新检测并通知用户？

// main.js
try {
  const worker = new Worker(new URL('./utils/autoupdate.ts', import.meta.url), { type: 'module' });

  worker.postMessage({ url: `${window.location.protocol}//${window.location.host}` });

  worker.onmessage = (e) => {
    if (e.data === 1) {
      // 使用合适的UI组件库弹窗提示用户更新
      elmessagebox.alert('新版本已上线，请刷新页面', {
        confirmbuttontext: '刷新',
        showclose: false,
        callback: () => {
          window.location.reload();
        },
      });
    }
  };
} catch (err) {
  console.error('Web Worker 初始化失败:', err);
}

// utils/autoUpdate.ts
let previousTimeTag: string | null;
let url: string;
let intervalTimer: number;

async function getTimeTag() {
  const res = await fetch(url, { method: 'HEAD', cache: 'no-cache' });
  return res.headers.get('etag') || res.headers.get('last-modified');
}

async function checkUpdate() {
  const currentTimeTag = await getTimeTag();
  console.log('currentTimeTag:', currentTimeTag, 'previousTimeTag:', previousTimeTag);

  if (currentTimeTag !== previousTimeTag) {
    clearInterval(intervalTimer);
    self.postMessage(1); // 向主线程发送更新消息
  }
}

self.onmessage = (e) => {
  const { url } = e.data;
  if (url) {
    (async () => {
      previousTimeTag = await getTimeTag();
      intervalTimer = setInterval(checkUpdate, 300000); // 每5分钟检查一次更新 (5 * 60 * 1000)
    })();
  } else {
    console.log('Worker 收到无效消息:', e.data);
  }
};