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

1npm install -S @jswork/event-mitt

usage

1import EventMitt from '@jswork/event-mitt';
2const Person = class { };
3Object.assign(Person.prototype, EventMitt);
4const p1 = new Person();
5const sum = 0;
6const total = 0;
7
8// attach events:
9var res = p1.on('ev1', () => {
10  console.log('ev1', sum);
11  sum = sum + 1;
12});
13
14p1.on('ev2', () => {
15  console.log('ev2', sum);
16  sum = sum + 3;
17});
18
19p1.on('ev3', () => {
20  console.log('ev3', sum);
21  sum = sum + 5;
22});
23
24p1.on('*', (name) => {
25  console.log('just a log', name);
26  total++;
27});
28
29// emit events:
30p1.emit('ev1');
31p1.emit('ev2');
32p1.emit('ev3');
33
34// destory:
35res.destroy();
36
37// ---- mitt fn ----
38import { mitt } from "@jswork/event-mitt";
39const emitter = mitt();
40
41let sum = 0;
42
43emitter.on("ev1", () => {
44  console.log("ev1", sum);
45  sum = sum + 1;
46});
47
48emitter.on("ev2", () => {
49  console.log("ev2", sum);
50  sum = sum + 3;
51});
52
53emitter.on("ev3", () => {
54  console.log("ev3", sum);
55  sum = sum + 5;
56});
57
58emitter.on("*", (name) => {
59  console.log("just a log", name);
60});
61
62emitter.emit("ev1");
63emitter.emit("ev2");
64emitter.emit("ev3");

license

Code released under the MIT license.