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

Browser compatibility

DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
addAll
Experimental
Chrome Full support 46
Notes
Full support 46
Notes
Notes Requires HTTPS.
Edge Full support 16Firefox 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 NoOpera Full support 33
Notes
Full support 33
Notes
Notes Requires HTTPS.
Safari Full support 11WebView 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 39Opera Android Full support 33
Notes
Full support 33
Notes
Notes Requires HTTPS.
Safari iOS Full support 11Samsung 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.

See also