---
title: KV
description: Specify KV namespaces to add to your environment as follows:
image: https://edgetunnel-b2h.pages.dev/dev-products-preview.png
---

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# KV

* [KV Reference](https://edgetunnel-b2h.pages.dev/kv/api/)

## Namespaces

Specify KV namespaces to add to your environment as follows:

**JavaScript**

```js
const mf = new Miniflare({
  kvNamespaces: ["TEST_NAMESPACE1", "TEST_NAMESPACE2"],
});
```

You can now access KV namespaces in your workers:

**JavaScript**

```js
export default {
  async fetch(request, env) {
    return new Response(await env.TEST_NAMESPACE1.get("key"));
  },
};
```

Miniflare supports all KV operations and data types.

## Manipulating Outside Workers

For testing, it can be useful to put/get data from KV outside a worker. You can do this with the `getKVNamespace` method:

**JavaScript**

```js
import { Miniflare } from "miniflare";


const mf = new Miniflare({
  modules: true,
  script: `
  export default {
    async fetch(request, env, ctx) {
      const value = parseInt(await env.TEST_NAMESPACE.get("count")) + 1;
      await env.TEST_NAMESPACE.put("count", value.toString());
      return new Response(value.toString());
    },
  }
  `,
  kvNamespaces: ["TEST_NAMESPACE"],
});


const ns = await mf.getKVNamespace("TEST_NAMESPACE");
await ns.put("count", "1");


const res = await mf.dispatchFetch("http://localhost:8787/");
console.log(await res.text()); // 2
console.log(await ns.get("count")); // 2
```

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```