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Introduction

secure-event-emitter is a tiny javascript package that uses restrict rules and mechanisms to build safer and protected event-driven architecture. It's similar to nodejs EventEmitter, but dictates stricter rules to prevent misuse.

The Main Features​

  • All event types must be predefined․
  • Not possible to call the emit() method anywhere without the emitterKey.
  • Ability to validate emitted values․

Installation​

npm install secure-event-emitter

Simple Usage Example​

import {SecureEventEmitter} from 'secure-event-emitter'

const eventTypes = ['event-1', 'event-2']
const emitterKey = Symbol()

const myEmitter = new SecureEventEmitter(eventTypes, emitterKey)

myEmitter.on('event-1', (a, b) => {
    console.log(a, b)
})

myEmitter.on('event-2', (x) => {
    console.log(x)
})

myEmitter.unlock(emitterKey).emit('event-1', 2021, 2022)
myEmitter.unlock(emitterKey).emit('event-2', 123)