The caches property of the StorageAccessHandle interface returns an unpartitioned CacheStorage object if access was granted, and throws a SecurityError DOMException otherwise.
A CacheStorage object.
document.requestStorageAccess({ caches: true }).then(
(handle) => {
console.log("caches access granted");
const cache = await handle.caches.open("foo");
await cache.add("/");
},
() => {
console.log("caches access denied");
},
);Note: See Using the Storage Access API for a more complete example.