---
title: Cache
description: Access to the default cache is enabled by default:
image: https://developers.cloudflare.com/dev-products-preview.png
---

> Documentation Index  
> Fetch the complete documentation index at: https://developers.cloudflare.com/workers/llms.txt  
> Use this file to discover all available pages before exploring further. 

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# Cache

* [Cache Reference](https://developers.cloudflare.com/workers/runtime-apis/cache)
* [How the Cache works](https://developers.cloudflare.com/workers/reference/how-the-cache-works/#cache-api)(note that cache using `fetch` is unsupported)

## Default Cache

Access to the default cache is enabled by default:

JavaScript

```
addEventListener("fetch", (e) => {  e.respondWith(caches.default.match("http://miniflare.dev"));});
```

## Named Caches

You can access a namespaced cache using `open`. Note that you cannot name your cache `default`, trying to do so will throw an error:

JavaScript

```
await caches.open("cache_name");
```

## Persistence

By default, cached data is stored in memory. It will persist between reloads, but not different `Miniflare` instances. To enable persistence to the file system, specify the cache persistence option:

JavaScript

```
const mf = new Miniflare({  cachePersist: true, // Defaults to ./.mf/cache  cachePersist: "./data", // Custom path});
```

## Manipulating Outside Workers

For testing, it can be useful to put/match data from cache outside a Worker. You can do this with the `getCaches` method:

JavaScript

```
import { Miniflare, Response } from "miniflare";
const mf = new Miniflare({  modules: true,  script: `  export default {    async fetch(request) {      const url = new URL(request.url);      const cache = caches.default;      if(url.pathname === "/put") {        await cache.put("https://miniflare.dev/", new Response("1", {          headers: { "Cache-Control": "max-age=3600" },        }));      }      return cache.match("https://miniflare.dev/");    }  }  `,});let res = await mf.dispatchFetch("http://localhost:8787/put");console.log(await res.text()); // 1
const caches = await mf.getCaches(); // Gets the global caches objectconst cachedRes = await caches.default.match("https://miniflare.dev/");console.log(await cachedRes.text()); // 1
await caches.default.put(  "https://miniflare.dev",  new Response("2", {    headers: { "Cache-Control": "max-age=3600" },  }),);res = await mf.dispatchFetch("http://localhost:8787");console.log(await res.text()); // 2
```

## Purging

You can programmatically purge all entries from a cache using the `purgeCache` method on the `Miniflare` instance. This is useful during development when cached assets need to be cleared without restarting the instance:

JavaScript

```
const mf = new Miniflare({ /* options */ });
// Purge the default cache and get the number of entries purgedconst count = await mf.purgeCache();console.log(`Purged ${count} entries`);
// Purge a specific named cacheawait mf.purgeCache("my-named-cache");
```

## Disabling

Both default and named caches can be disabled with the `disableCache` option. When disabled, the caches will still be available in the sandbox, they just won't cache anything. This may be useful during development:

JavaScript

```
const mf = new Miniflare({  cache: false,});
```

```json
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```