@types/on-headers/README.md

TypeScript definitions for on-headers

# Installation
> `npm install --save @types/on-headers`

# Summary
This package contains type definitions for on-headers (https://github.com/jshttp/on-headers).

# Details
Files were exported from https://github.com/DefinitelyTyped/DefinitelyTyped/tree/master/types/on-headers.
## [index.d.ts](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/master/types/on-headers/index.d.ts)
````ts
/// <reference types="node" />

import { ServerResponse } from "http";

/**
 * This will add the listener to fire when headers are emitted for res.
 * The listener is passed the response object as its context (this).
 * Headers are considered emitted only once, right before they
 * are sent to the client.
 *
 * When this is called multiple times on the same res, the listeners
 * are fired in the reverse order they were added.
 *
 * @param res HTTP server response object
 * @param listener Function to call prior to headers being emitted,
 *        the response object is passed as this context.
 */
declare function onHeaders(res: ServerResponse, listener: (this: ServerResponse) => void): void;

export = onHeaders;

````

### Additional Details
 * Last updated: Sat, 07 Jun 2025 02:15:25 GMT
 * Dependencies: [@types/node](https://npmjs.com/package/@types/node)

# Credits
These definitions were written by [John Jeffery](https://github.com/jjeffery), [BendingBender](https://github.com/BendingBender), and [Sebastian Beltran](https://github.com/bjohansebas).