changlin-observer

观察者模式 / 事件监听 订阅，触发 发布/ event listening

安装

npm i changlin-observer --save
//或者
npm install changlin-observer --save

使用

//例1
import {Observer} from "changlin-observer"
let observer=new Observer({
    needCache:true//是否需要缓存已触发但是未被监听的事件，默认为false
});
let result;
observer.trigger('event','a','b','c');
observer.listen('event',function(a,b,c){
     result=b
 });
result//=>'b'

//例2  （若存在方法命名冲突，可修改方法名）
import {Observer} from "changlin-observer"
 let observer2 = new Observer({
            methodsReplace: {
                listen: 'subscribe',
                remove: 'unsubscribe',
                trigger: 'publish'
            }
        });
 let result=0,cb=function(a){result=a};
  observer2.subscribe('e',cb);
  observer2.publish('e',3);
  result//=>3

//例3
let Observer=require('changlin-observer').Observer;
function Person(){
   Observer.call(this);
   this.age=18;
   this.height=180;
}

let person=new Person();
let that,a1,a2,a3,count=0;
 person.listen('e',function(a,b,c){
     that=this;
     a1=a;a2=b;a3=c;
 });
 person.trigger('e',11,22,33);
 that//
 a1//=>11
 a2//=>22
 a3//=>33

//例4
import {Observer} from "changlin-observer"
class Person {
  constructor(x, y) {
   Observer.call(this)
  }
}

let person=new Person();
let that,a1,a2,a3,count=0;
 person.listen('e',function(a,b,c){
     that=this;
     a1=a;a2=b;a3=c;
 });
 person.trigger('e',11,22,33);
 that//
 a1//=>11
 a2//=>22
 a3//=>33

实例方法

| 方法 | 描述 | | --- | --- | | listen | 事件监听 | | on | 事件监听,可批量监听，用空格分割 ,例如：on('start move',function(){}) | | one | 事件监听，回调函数执行一次后会被移除 | | remove | 移除事件监听函数(只支持单个移除) | | listen | 触发事件 |