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51 lines
1.1 KiB
Markdown
51 lines
1.1 KiB
Markdown
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# listenercount
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backwards compatible version of builtin events.listenercount
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[]()
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[][circleci]
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[circleci]: https://circleci.com/gh/jden/node-listenercount
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[standard]: http://standardjs.com/
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A polyfill of Node.js 0.12+'s events.listenerCount function for Node.js 0.10. Uses the builtin if present, otherwise uses polyfill implementation.
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## usage
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```js
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var listenerCount = require('listenercount')
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var EventEmitter = require('events').EventEmitter
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var ee = new EventEmitter()
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ee.on('event', function () {})
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listenerCount(ee, 'event') // => 1
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listenerCount(ee, 'foo') // => 0
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```
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## api
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### `listenerCount(ee : EventEmitter, eventName : String) => Number`
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Returns the number of listeners for a given `eventName` on an EventEmitter.
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## installation
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$ npm install listenercount
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## running the tests
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From package root:
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$ npm install
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$ npm test
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## contributors
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- jden <jason@denizac.org>
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## license
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ISC. (c) MMXVI jden <jason@denizac.org>. See LICENSE.md
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