CacheStorage

The Cache API (caches, CacheStorage, Cache) is the storage layer for the Service Worker fetch-interception path. It stores Response objects keyed by Request (URL), supports match across all caches, and is used by the SW implementation to serve cached responses offline.

Globals

Global	Type
caches	CacheStorage instance
CacheStorage	class
Cache	class

CacheStorage

const cache = await caches.open('v1');
await cache.add('/api/data');             // fetch + put
await cache.addAll(['/a', '/b', '/c']);
const res = await cache.match('/api/data');
const any = await caches.match('/api/data');  // search across all caches

Method	Description
caches.open(name)	Open (or create) a named cache
caches.delete(name)	Delete a named cache
caches.match(req)	Search all caches for req, return first hit
caches.has(name)	Check existence of a named cache
caches.keys()	List all named caches

Cache

Method	Description
match(req)	Look up a stored Response by request
matchAll(req?)	Return all matching stored responses
add(req)	Fetch and store (single request)
addAll(reqs[])	Fetch and store multiple
put(req, res)	Store an explicit (Request, Response) pair
delete(req)	Remove a stored entry
keys()	List all stored requests

Notes

• Response objects stored in a cache are cloned (the original remains usable). See streams for the tee semantics behind Response.clone().
• CacheStorage backs the Service Worker's offline layer; for general key-value storage use qzjs.storage.