The ServiceWorkerGlobalScope.caches read-only property returns the CacheStorage object associated with the service worker.
var myCacheStorage = self.caches;
A CacheStorage object.
| Specification | Status | Comment |
|---|---|---|
| Service Workers The definition of 'ServiceWorkerGlobalScope.caches' in that specification. | Editor's Draft | Initial definition. |
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
|---|---|---|---|---|---|
| Basic support | 40.0 | 44.0 (44.0)[1] | No support | ? | No support |
| Feature | Android | Firefox Mobile (Gecko) | Firefox OS | IE Mobile | Opera Mobile | Safari Mobile | Chrome for Android |
|---|---|---|---|---|---|---|---|
| Basic support | ? | 44.0 (44.0) | (Yes) | No support | ? | No support | ? |
[1] Service workers (and Push) have been disabled in the Firefox 45 and 52 Extended Support Releases (ESR.)
Promise
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https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorkerGlobalScope/caches