JavaScript——类的根据属性名_获取/修改_属性

通过传入的类属性名获取、修改对应的类属性：

    var label_set =  '';
    var type_set =   '';
    var labelOption = '';      
    class Service_data{
        constructor() {
            //固定属性
            this.conversationCount =  {name:'会话数',type:type_set, label: label_set ,data: []};
            this.doubleConversationCount =  {name: '两人会话总数', type: type_set,  label: label_set ,data: []};
            this.temporaryConversationCount =  {name: '临时多人会话', type: type_set,  label: label_set ,data: []};
            this.groupConversationCount =  {name: '群组会话总数', type: type_set , label: label_set , data: []};
            this.informationNumCount =  {name: '资讯号总数', type: type_set , label: label_set , data: []};
            this.informationCount =  {name: '资讯总数', type: type_set , label: label_set , data: []};
            this.informationReadCount =  {name: '阅读数', type: type_set ,  label: label_set,data: []};
            this.informationCommentCount =  {name: '资讯评论数', type: type_set , label:label_set , data: []};
            this.informationPraiseCount =  {name: '资讯点赞总数', type: type_set , label: label_set, data: []};
            this.colleaguesCount =  {name: '同事圈总数', type: type_set ,  label: label_set,data: []};
            this.colleaguesCommentCount =  {name: '同事圈评论总数', type: type_set , label:label_set, data: []};  
        }
        setdata(name,list){
            if(this.hasOwnProperty(name)){
                let save_data = Object.getOwnPropertyDescriptor(this,name).value;
                save_data.data = list;
            }else{
                console.log(name+"没有对应属性！");
            }
        }
        getdata(name){
            if(this.hasOwnProperty(name)){
                return Object.getOwnPropertyDescriptor(this,name).value;
            }else{
                console.log(name+"没有对应属性！");
            }
        }
    }
    var service_dataInit = new Service_data();
    var setdata_resule = service_dataInit.setdata('conversationCount',['1','2']);
    var getdata_resule = service_dataInit.getdata('conversationCount');
    console.log(getdata_resule);    

 

使用方法：

 

Object.getOwnPropertyDescriptor() 方法返回指定对象上一个自有属性对应的属性描述符。（自有属性指的是直接赋予该对象的属性，不需要从原型链上进行查找的属性）

参数

obj

需要查找的目标对象

prop

目标对象内属性名称（String类型）

返回值

如果指定的属性存在于对象上，则返回其属性描述符对象（property descriptor），否则返回 undefined。

---

 

hasOwnProperty() 方法会返回一个布尔值，指示对象自身属性中是否具有指定的属性

参数

prop

要检测的属性   字符串 名称或者 Symbol。

返回值

用来判断某个对象是否含有指定的属性的 Boolean 。