CacheStorage.open()

caches.open(cacheName).then(function(cache) {
  //обрабатываем кеш например: cache.AddAll(filesToCache); где filesToCache = ['/mypic.png', ...]
});

Promise который резолвится в запрашиваемый Cache объект.

cacheName

Имя (тег) кеша заданное заранее которое необходимо открыть.

This code snippet is from the MDN sw-test example (see sw-test running live). Here we wait for a FetchEvent to fire. Then we construct a custom response like so:

1. Check whether a match for the request is found in the CacheStorage using CacheStorage.match. If so, serve that.
2. If not, open the v1 cache using CacheStorage.open, put the default network request in the cache using Cache.put and return a clone of the default network request using return response.clone() — necessary because put() consumes the response body.
3. If this fails (e.g., because the network is down), return a fallback response.

var response;
var cachedResponse = caches
  .match(event.request)
  .catch(function () {
    return fetch(event.request);
  })
  .then(function (r) {
    response = r;
    caches.open("v1").then(function (cache) {
      cache.put(event.request, response);
    });
    return response.clone();
  })
  .catch(function () {
    return caches.match("/sw-test/gallery/myLittleVader.jpg");
  });

• Using Service Workers
• Cache
• WorkerGlobalScope.caches