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. 

NoteaddAll() 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.


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


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

Return value

A Promise that resolves with void.


Exception Happens when

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.)


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

this.addEventListener('install', function(event) {
  event.waitUntil('v1').then(function(cache) {
      return cache.addAll([


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

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support46116392 No331 No
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support461461 No39331 No5.0

1. Requires HTTPS.

2. Service workers (and Push) have been disabled in the Firefox 45 & 52 Extended Support Releases (ESR).

See also

Document Tags and Contributors

Last updated by: ricea,