Reflect(反射)
Reflect Proxy 同樣都是 es6 用來操做對象的API(接口)
var obj={
name:'shi',
age:19,
sex:'女'
}
//obj.school="師徒"
//Object.defineProperty(obj,"school",{value:"師徒"});
Reflect.defineProperty(obj,"school",{value:"師徒"});
console.log(obj);//Object {name: "shi", age: 19, sex: "女", school: "師徒"}
2.讓object的操做都變成函數行爲
//delete obj.age
console.log(obj);//Object {name: "shi", sex: "女", school: "師徒"}
Reflect.deleteProperty(obj,'age');
console.log('sex' in obj);//true
console.log(Reflect.has(obj,'sex'));//true
Proxy(代理。攔截器)
直接操做
var obj={
name:'shi',
age:19,
sex:'女'
}
obj.name="shishi";
console.log(obj.age);//19
console.log(obj);//Object {name: "shishi", age: 19, sex: "女"}*/
代理操做
var obj={
name:'shi',
age:19,
sex:'女'
}
var proxObj=new Proxy(obj,{
//賦值
sex:function(target,key,value){
if(value!="shi1shi"){
target[key]=value;
}
},
//取值
get:function(targer,key){
if(targer[key]==undefined){
return "沒有該屬性"
}
}
});
proxObj.name="shishi";
console.log(proxObj);//{name: "shishi", age: 19, sex: "女"}
console.log(proxObj.legs);//沒有該屬性