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event-mitt

A mini and light event emitter

version license size download

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");

license

Code released under the MIT license.