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31 lines
1.1 KiB
Markdown
31 lines
1.1 KiB
Markdown
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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
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import { caches } from 'undici'
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const cache_1 = await caches.open('v1')
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const cache_2 = await caches.open('v1')
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// Although .open() creates a new instance,
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assert(cache_1 !== cache_2)
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// The same Response is matched in both.
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assert.deepStrictEqual(await cache_1.match('/req'), await cache_2.match('/req'))
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```
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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
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const response = await cache_1.match('/req')
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await caches.delete('v1')
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await response.text() // the Response's body
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```
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