javascript - fetch()，你如何发出非缓存请求？

Question

使用 fetch('somefile.json')，可以请求从服务器而不是浏览器缓存中获取文件吗？

换句话说，使用fetch()，是否可以绕过浏览器的缓存？

Answer 1

更容易使用缓存模式:

  // Download a resource with cache busting, to bypass the cache
  // completely.
  fetch("some.json", {cache: "no-store"})
    .then(function(response) { /* consume the response */ });

  // Download a resource with cache busting, but update the HTTP
  // cache with the downloaded resource.
  fetch("some.json", {cache: "reload"})
    .then(function(response) { /* consume the response */ });

  // Download a resource with cache busting when dealing with a
  // properly configured server that will send the correct ETag
  // and Date headers and properly handle If-Modified-Since and
  // If-None-Match request headers, therefore we can rely on the
  // validation to guarantee a fresh response.
  fetch("some.json", {cache: "no-cache"})
    .then(function(response) { /* consume the response */ });

  // Download a resource with economics in mind!  Prefer a cached
  // albeit stale response to conserve as much bandwidth as possible.
  fetch("some.json", {cache: "force-cache"})
    .then(function(response) { /* consume the response */ });

引用:https://hacks.mozilla.org/2016/03/referrer-and-cache-control-apis-for-fetch/