# copy-listeners

> copy (or move) event listeners from one event emitter to another

Latest version **1.0.1** (published 2017-02-04) · MIT license · 0 weekly downloads

## Install

```sh
npm install copy-listeners
pnpm add copy-listeners
yarn add copy-listeners
bun add copy-listeners
```

## Health

**Score 15/100 (F)** — status: abandoned.

Positive: no vulnerabilities.

Warnings: low downloads; no types; no esm support.

Negative: abandoned; low maintenance score.

## Facts

| | |
|---|---|
| Version | 1.0.1 |
| Published | 2017-02-04 |
| First published | 2016-04-12 |
| Weekly downloads | 0 |
| License | MIT |
| TypeScript types | none |
| Module format | CommonJS |
| Dependencies | 2 |
| Known vulnerabilities | 0 (+1 in 1 direct dependencies) |
| Install scripts | no |
| GitHub stars | 2 |
| Author | Tejesh Mehta |
| Maintainers | tjmehta |
| Keywords | copy, move, events, listeners, handlers, emitter, emitters, handler, listener |

## Links

- npm: https://www.npmjs.com/package/copy-listeners
- Repository: https://github.com/tjmehta/copy-listeners
- Issues: https://github.com/tjmehta/copy-listeners/issues
- npm.io page: https://npm.io/package/copy-listeners

## Dependencies (2)

- [101](https://npm.io/package/101.md) ^1.5.0
- [toarray](https://npm.io/package/toarray.md) 0.0.1

## Alternatives

- [async-exit-hook](https://npm.io/package/async-exit-hook.md) — 3.7M weekly downloads
- [evnty](https://npm.io/package/evnty.md) — 7.2K weekly downloads
- [eleventy-plugin-asciidoc](https://npm.io/package/eleventy-plugin-asciidoc.md) — 3.5K weekly downloads
- [@jswork/next-get2get](https://npm.io/package/@jswork/next-get2get.md) — 945 weekly downloads
- [@dashersw/axon](https://npm.io/package/@dashersw/axon.md) — 934 weekly downloads

## Recent versions

- 1.0.1 (latest) — 2017-02-04
- 1.0.0 — 2016-04-12

## README

# copy-listeners [![Build Status](https://travis-ci.org/tjmehta/copy-listeners.svg)](https://travis-ci.org/tjmehta/copy-listeners) [![js-standard-style](https://img.shields.io/badge/code%20style-standard-brightgreen.svg?style=flat)](http://standardjs.com/)
copy (or move) event listeners from one event emitter to another

# Installation
```bash
npm i --save copy-listeners
```

# Usage

### Example: copy all listeners from one event emitter to another
```js
var copyListeners = require('copy-listeners')

var ee = new EventEmitter()
var ee2 = new EventEmitter()

ee.on('foo', function () {
  console.log('FOO!')
})

copyListeners(ee, ee2)

ee.emit('foo') // prints "FOO!".. like normal
ee2.emit('foo') // prints "FOO!".. the listener was copied to ee2
```

### Example: copy select listeners from one event emitter to another
```js
var copyListeners = require('copy-listeners')

var ee = new EventEmitter()
var ee2 = new EventEmitter()

ee.on('foo', function () {
  console.log('FOO!')
})
ee.on('bar', function () {
  console.log('BAR!')
})

copyListeners(ee, ee2, ['bar'])

ee.emit('foo') // prints "FOO!".. like normal
ee2.emit('foo') // does nothing.. was not copied
ee.emit('bar') // prints "BAR!".. like normal
ee2.emit('bar') // prints "BAR!".. the listener was copied to ee2
```

### Example: move all listeners from one event emitter to another (removes listeners from source)
```js
var moveListeners = require('copy-listeners').moveListeners

var ee = new EventEmitter()
var ee2 = new EventEmitter()

ee.on('foo', function () {
  console.log('FOO!')
})
ee.on('bar', function () {
  console.log('BAR!')
})

moveListeners(ee, ee2)

ee.emit('foo') // does nothing.. it was removed
ee2.emit('foo') // prints "FOO!".. the listener was copied to ee2
ee.emit('bar') // does nothing.. it was removed
ee2.emit('bar') // prints "BAR!".. the listener was copied to ee2
```

### Example: move select listeners from one event emitter to another (removes listeners from source)
```js
var moveListeners = require('copy-listeners').moveListeners

var ee = new EventEmitter()
var ee2 = new EventEmitter()

ee.on('foo', function () {
  console.log('FOO!')
})
ee.on('bar', function () {
  console.log('BAR!')
})

moveListeners(ee, ee2, ['bar'])
// to move all listeners don't provide `events`: moveListeners(ee, ee2)

ee.emit('foo') // prints "FOO!".. like normal
ee2.emit('foo') // does nothing.. was not copied
ee.emit('bar') // does nothing.. it was removed
ee2.emit('bar') // prints "BAR!".. the listener was copied to ee2
```

# License
MIT

---
_Source: https://npm.io/package/copy-listeners · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._