如何在 respondWith 中 cancel/modify/alter/replace 请求?

How to cancel/modify/alter/replace a request in respondWith?

我正在使用工作箱并尝试缓存这样的请求:

this.serviceWorker.addEventListener('fetch', (event) => {
const request = event.request;
event.respondWith(
      caches.open('cache name')
         .then(cache => cache.match(request))
         .then(async (cachedResponse) => {
            // todo something

如何取消 event.request 并发送我的自定义请求? 感谢您的帮助。

您可以像这样更改或完全更改传出请求:

this.serviceWorker.addEventListener('fetch', (event) => {
  const request = event.request;
  return event.respondWith(
    caches.open('cache name')
      .then(cache => cache.match(request))
      .then(async (cachedResponse) => {
        // create a new request, fetchi it, and return the result
        return fetch(new Request(request.url ....))
       })

注意我在第三行代码中添加的return语句:)

有关构建新请求的更多信息: