@jswork/event-mitt NPM

event-mitt

A mini and light event emitter

apis

name	params	description
on	name/*,handler	register an event
off	name,handler	unregister an event
emit	name,obj	fire an event
one	name,handler	fire an event,only can register once, same function
once	name,handler	fire an event,only can execute once
upon	name,handler	fire an event, only register once, different function
on2immediate	name,handler	Fire an event, immdiate execute function

installation

npm install -S @jswork/event-mitt

usage

import EventMitt from '@jswork/event-mitt';
const Person = class { };
Object.assign(Person.prototype, EventMitt);
const p1 = new Person();
const sum = 0;
const total = 0;

// attach events:
var res = p1.on('ev1', () => {
  console.log('ev1', sum);
  sum = sum + 1;
});

p1.on('ev2', () => {
  console.log('ev2', sum);
  sum = sum + 3;
});

p1.on('ev3', () => {
  console.log('ev3', sum);
  sum = sum + 5;
});

p1.on('*', (name) => {
  console.log('just a log', name);
  total++;
});

// emit events:
p1.emit('ev1');
p1.emit('ev2');
p1.emit('ev3');

// destory:
res.destroy();

// ---- mitt fn ----
import { mitt } from "@jswork/event-mitt";
const emitter = mitt();

let sum = 0;

emitter.on("ev1", () => {
  console.log("ev1", sum);
  sum = sum + 1;
});

emitter.on("ev2", () => {
  console.log("ev2", sum);
  sum = sum + 3;
});

emitter.on("ev3", () => {
  console.log("ev3", sum);
  sum = sum + 5;
});

emitter.on("*", (name) => {
  console.log("just a log", name);
});

emitter.emit("ev1");
emitter.emit("ev2");
emitter.emit("ev3");