# fetchRP

**Kind:** Function

**Source:** [`src/client/fetch-result-please.ts`](https://github.com/honojs/hono/blob/main/src/client/fetch-result-please.ts#L14)

**Part of:** [Client](subsystem-src-client)

Smartly parses and return the consumable result from a fetch `Response`.

Throwing a structured error if the response is not `ok`. (DetailedError)

`fetchRP` accepts a Fetch API `Response` and parses it into a value callers can consume. If the response is not `ok`, it throws a `DetailedError` so request code can handle failures through a single error path.

## Signature

```ts
async function fetchRP(fetchRes: Response | Promise<Response>): Promise<any>
```

## Parameters

| Name | Type |
|---|---|
| `fetchRes` | `Response | Promise<Response>` |

**Returns:** `Promise<any>`

## Diagram

```mermaid
graph LR
  A[fetch request] --> B[Response]
  B --> C[fetchRP]
  C --> D{response.ok}
  D -->|true| E[Parsed result]
  D -->|false| F[DetailedError]
```

## Usage

```ts
import { fetchRP } from './client/fetch-result-please';

async function loadProfile() {
  const response = await fetch('/api/profile');

  try {
    const profile = await fetchRP(response);
    return profile;
  } catch (error) {
    console.error('Profile request failed:', error);
    throw error;
  }
}
```

## AI Coding Instructions

- Pass the original `Response` to `fetchRP` before reading its body with `json()`, `text()`, or similar methods.
- Await `fetchRP`, since parsing the response body is asynchronous.
- Handle errors around `fetchRP`; non-`ok` responses throw `DetailedError`.
- Keep request code focused on making the fetch call and let `fetchRP` decide how to parse the response.

## Used by

1 reference from 1 file. Each is a place in this repository where the symbol is actually used — go read one rather than trusting an example.

### Imported by (1)

- `mergePath` — `src/client/utils.ts`:11