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Cache.addAll

This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The addAll() method of the Cache interface takes an array of URLs, retrieves them, and adds the resulting response objects to the given cache. The request objects created during retrieval become keys to the stored response operations.

Note: addAll() will overwrite any key/value pairs previously stored in the cache that match the request, but will fail if a resulting put() operation would overwrite a previous cache entry created by the same addAll() method.

Syntax

cache.addAll(requests[]).then(function() {
  // requests have been added to the cache
});

Parameters

requests: An array of string URLs that you want to be fetched and added to the cache.

Return value

A Promise that resolves with void.

Exceptions

Exception Happens when

Exception	Happens when
`TypeError`	The URL scheme is not `http` or `https`. The Response status is not in the 200 range (i.e., not a successful response.) This occurs if the request does not return successfully, but also if the request is a cross-origin no-cors request (in which case the reported status is always 0.)

TypeError

The URL scheme is not http or https.

The Response status is not in the 200 range (i.e., not a successful response.) This occurs if the request does not return successfully, but also if the request is a cross-origin no-cors request (in which case the reported status is always 0.)

Examples

This code block waits for an InstallEvent to fire, then runs waitUntil() to handle the install process for the app. This consists of calling CacheStorage.open to create a new cache, then using addAll() to add a series of assets to it.

this.addEventListener('install', function(event) {
  event.waitUntil(
    caches.open('v1').then(function(cache) {
      return cache.addAll([
        '/sw-test/',
        '/sw-test/index.html',
        '/sw-test/style.css',
        '/sw-test/app.js',
        '/sw-test/image-list.js',
        '/sw-test/star-wars-logo.jpg',
        '/sw-test/gallery/',
        '/sw-test/gallery/bountyHunters.jpg',
        '/sw-test/gallery/myLittleVader.jpg',
        '/sw-test/gallery/snowTroopers.jpg'
      ]);
    })
  );
});

Specifications

Specification	Status	Comment
Service Workers The definition of 'Cache: addAll' in that specification.	Working Draft	Initial definition.

Browser compatibilityUpdate compatibility data on GitHub

	Desktop
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	46 46 Requires HTTPS.	16	39 39 Service workers (and Push) have been disabled in the Firefox 45 & 52 Extended Support Releases (ESR).	No	33 33 Requires HTTPS.	No

	Mobile
	Android webview	Chrome for Android	Edge Mobile	Firefox for Android	Opera for Android	iOS Safari	Samsung Internet
Basic support	46 46 Requires HTTPS.	46 46 Requires HTTPS.	No	39	33 33 Requires HTTPS.	No	5.0