Author: Enpatika.com

An event emitter is a pattern that listens to a named event, fires a callback, then emits that event with a value . Sometimes this is referred to as a “pub/sub” model, or listener.25 Mar 2019

js allows us to create and handle custom events easily by using events module. Event module includes EventEmitter class which can be used to raise and handle custom events. The following example demonstrates EventEmitter class for raising and handling a custom event.

It adds the listener at the end of the listener’s array for the specified event . Multiple calls to the same event and listener will add the listener multiple times and correspondingly fire multiple times. Both functions return emitter, so calls can be chained. Emitting events: Every event is named event in nodejs.

Event emitters and listeners are crucial to NodeJS development, and many other programming languages development. They are very useful when you have some function that needs to execute “whenever this other thing happens”, without requiring that function to finish or even work for that matter .

A Redux middleware to reduce only one line of code (you don’t have to import specific action). With this libray, you may refactor your electron code and reat native code into a common shared code and refactor out Electron’s IPC(possibly). …