vue 数据监听原理

 1     Vue.prototype.listenDatas = function(){
 2         for(var attr in this.$data){
 3             this.listenData(this,attr,this.$data);
 4             if(Array.isArray(this.$data[attr])){
 5                 this.$data[attr].__proto__ = this.newArrMethods;
 6                 for(var i=0;i<this.$data[attr].length;i++){
 7                     for(var attr_child in this.$data[attr][i]){
 8                         this.listenData(this.$data[attr][i],attr_child,this.cloneObj(this.$data[attr][i]));
 9                     }
10                 }
11             }
12         }
13     };
14     Vue.prototype.listenData = function(obj,attr,data){
15         var This = this;
16         Object.defineProperty(obj, attr, {
17             configurable : true,
18             enumerable : true,
19             get : function(){
20                 return data[attr];
21             },
22             set : function(val){
23                 data[attr] = val;
24                 This.render(This.$temp);
25             }
26         });
27     };

 

posted @ 2018-03-07 10:42  一像素boy  阅读(507)  评论(0编辑  收藏  举报