使用代理Proxy控制函数 数组使用代理拦截操作

function factorial(num){
    debugger
    return num==1?1:num*factorial(num-1);
}

let proxy=new Proxy(factorial,{
    
    apply(func,obj,args){
        debugger
        console.time("run");
        func.apply(this,args);
        console.log(this);
        console.timeEnd("run");
    }
});
proxy.apply({},[1000]);

 

const lessons=[
    {title:"124"},
    {title:"365"},
    {title:"12564"},
];
let proxy1=new Proxy(lessons,
   { get(array,key){
       debugger
        const tilte= array[key].title;

        return tilte;
    }}
)

console.log(JSON.stringify(proxy1[1],null,2));

 https://www.jianshu.com/p/77eaaf34e732