# knownUserAgents

**Kind:** Constant

**Source:** [`src/helper/adapter/index.ts`](https://github.com/honojs/hono/blob/main/src/helper/adapter/index.ts#L43)

**Part of:** [Helper](subsystem-src-helper)

## Definition

```ts
Partial<Record<Runtime, string>>
```

## Value

```ts
{
  deno: 'Deno',
  bun: 'Bun',
  workerd: 'Cloudflare-Workers',
  node: 'Node.js',
}
```