如何在 React PWA 中将数据从 API 缓存到缓存存储?

问题描述

我使用 ReactJS 构建了一个渐进式 Web 应用程序，但遇到了问题.我正在使用 mockApi 来获取数据.离线时，我的应用程序不起作用，因为 Service Worker 仅缓存静态资产.

I built a Progressive Web App with ReactJS and have an issue. I am using mockApi to fetch the data.When offline, my app doesn't work since the service worker only caches static assets.

如何将来自 mockApi 的 HTTP GET 调用保存到缓存存储中?

How can I save HTTP GET calls from mockApi into the cache storage?

推荐答案

除了静态资源，您还可以定义要缓存的 URL:

Along with your static assets, you can define which URLs do you want to cache:

var CACHE_NAME = 'my-cache_name';
var targetsToCache = [
  '/styles/myStyles.scss',
  'www.stackoverflow.com/'
];

self.addEventListener('install', function(event) {
  event.waitUntil(
    caches.open(CACHE_NAME)
      .then(function(cache) {
        return cache.addAll(targetsToCache);
      })
  );
});

然后你必须指示你的 service worker 拦截网络请求，看看是否与 targetsToCache 中的地址匹配:

Then you have to instruct your service worker to intercept the network requests and see if there is a match with the addresses in the targetsToCache:

self.addEventListener('fetch', function(event) {
    event.respondWith(
        caches.match(event.request).then(function(response) {

         // This returns the previously cached response
         // or fetch a new once if not already in the cache
            return response || fetch(event.request);
        })
    );
});

我写了一个系列如果您有兴趣了解更多有关渐进式 Web 应用的文章.

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