event-source

Reduction of an EventEmitter to a composable event-stream

Install

npm install @strong-roots-capital/event-source

Use

import { eventSource } from '@strong-roots-capital/event-source'
let a = new EventSource()
let b = new EventSource()
let es = a.merge(b.map((n: number) => 'I mapped this! ' + n))

es.on('event', (event: string | symbol, ...args: any[]) => {
    console.log(event, args)
})

a.emit('unmapped', 1)
//=> unmapped [ 1 ]

b.emit('mapped', 1)
//=> mapped [ 'I mapped this! 1' ]

Related

• observable

Acknowledgments

• Deprecating the Observer Pattern with Scala.React