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");

license

Code released under the MIT license.