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
TypeError
-
The URL scheme is not
http
orhttps
.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 |
---|
Service Workers 1 # cache-addAll |
Browser compatibility
BCD tables only load in the browser