Web/API/Cache/addAll

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 stored 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. You can specify the Request object instead of the URL.

Return value

A Promise that resolves with undefined.

Exceptions

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.)

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 WorkersThe definition of 'Cache: addAll' in that specification.	Working Draft	Initial definition.

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`addAll` Experimental'	Chrome Full support 46 Notes' Full support 46 Notes' Notes' Requires HTTPS.	Edge Full support 16	Firefox Full support 39 Notes' Full support 39 Notes' Notes' Extended Support Releases (ESR) before Firefox 78 ESR do not support service workers and the Push API.	IE No support No	Opera Full support 33 Notes' Full support 33 Notes' Notes' Requires HTTPS.	Safari Full support 11	WebView Android Full support 46 Notes' Full support 46 Notes' Notes' Requires HTTPS.	Chrome Android Full support 46 Notes' Full support 46 Notes' Notes' Requires HTTPS.	Firefox Android Full support 39	Opera Android Full support 33 Notes' Full support 33 Notes' Notes' Requires HTTPS.	Safari iOS Full support 11	Samsung Internet Android Full support 5.0 Notes' Full support 5.0 Notes' Notes' Requires HTTPS.

Legend

Full support: Full support
No support: No support
Experimental. Expect behavior to change in the future.': Experimental. Expect behavior to change in the future.
See implementation notes.': See implementation notes.