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| class dataCenter {
/**
* 初始化
*/
constructor(fn_list=[],...args) {
this.fn_list = fn_list;
this.data = args
return new Proxy(this.data,this.handler)
}
/**
* handler 数据劫持
*/
handler = () => {
get: function(target, propKey, receiver) {
return Reflect.get(target, propKey, receiver);
},
set: function(target, propKey, value, receiver) {
this.cb(value,receiver)
return Reflect.set(target, propKey, value, receiver);
}
}
/**
* 注册回调->观察者
*/
ob=(fn)=>{
this.fn_list.push(fn)
}
/**
* 发布者
*/
cb=(newvalue,oldValue)=>{
const fn_list = this.fn_list;
for(var i in fn_list){
fn_list[i](newvalue,oldValue)
}
}
remove=(fn)=>{
//在当前回调列表移除该函数
}
}
|