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PR-URL: #47994 Reviewed-By: Matthew Aitken <maitken033380023@gmail.com> Reviewed-By: Moshe Atlow <moshe@atlow.co.il> Reviewed-By: Mohammed Keyvanzadeh <mohammadkeyvanzade94@gmail.com> Reviewed-By: Mestery <mestery@protonmail.com>
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# CacheStorage | ||
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Undici exposes a W3C spec-compliant implementation of [CacheStorage](https://developer.mozilla.org/en-US/docs/Web/API/CacheStorage) and [Cache](https://developer.mozilla.org/en-US/docs/Web/API/Cache). | ||
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## Opening a Cache | ||
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Undici exports a top-level CacheStorage instance. You can open a new Cache, or duplicate a Cache with an existing name, by using `CacheStorage.prototype.open`. If you open a Cache with the same name as an already-existing Cache, its list of cached Responses will be shared between both instances. | ||
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```mjs | ||
import { caches } from 'undici' | ||
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const cache_1 = await caches.open('v1') | ||
const cache_2 = await caches.open('v1') | ||
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// Although .open() creates a new instance, | ||
assert(cache_1 !== cache_2) | ||
// The same Response is matched in both. | ||
assert.deepStrictEqual(await cache_1.match('/req'), await cache_2.match('/req')) | ||
``` | ||
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## Deleting a Cache | ||
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If a Cache is deleted, the cached Responses/Requests can still be used. | ||
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```mjs | ||
const response = await cache_1.match('/req') | ||
await caches.delete('v1') | ||
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await response.text() // the Response's body | ||
``` |
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