is-emitter

Check that given value is EventEmitter, not so strict as is-node-emitter.

Install

npm i is-emitter --save

Usage

For more use-cases see the tests

var isEmitter = require('is-emitter')

return `true` for emitters and streams

var fs = require('fs')
var cp = require('child_process')
var DualEmitter = require('dual-emitter')

isEmitter(process)
isEmitter(process.stdin)
isEmitter(process.stdout)
isEmitter(cp.exec('echo hello world'))
isEmitter(fs.createReadStream('./index.js'))
isEmitter(DualEmitter())

return `false` otherwise

function Func () {}

isEmitter(1234)
isEmitter(['a'])
isEmitter(/regex/)
isEmitter({a: 'b'})
isEmitter(function () {})
isEmitter(new Func())
isEmitter(new Date())

component-emitter: Event emitter
dual-emitter: 🍹 EventEmitter done right and no dependencies. For nodejs and the browser (>= IE8). Can… more
is-node-emitter: Strictly checks that given value is nodejs EventEmitter. It's easy, because his API is in… more

Contributing

Pull requests and stars are always welcome. For bugs and feature requests, please create an issue.
But before doing anything, please read the CONTRIBUTING.md guidelines.