vue3的数据响应用了proxy的方式，所有特来实验一下下。
let Watcher=function (obj,setFunc,getFunc) {
let handler={
get(target,property,receiver){
let val=Reflect.get(target, property, receiver);
getFunc(property,val);
if(typeof val==='object'){
return Watcher(val,setFunc,getFunc);
}else{
return val
}
},
set(target,property,value,receiver){
let old=Reflect.get(target, property, receiver);
if(!Reflect.has(target,property)||old!==value){
setFunc(property,value,old);
}
return Reflect.set(target, property, value,receiver)
}
};
return new Proxy(obj,handler)
};
let person=Watcher({name:'张三',hobby:{cheese:true}},function (key,newVal,oldVal) {
console.log(key,newVal,oldVal)
},function (key,val) {
console.log(key,val)
});
// person.name='李四';
//person.hobby.cheese=false;
// console.log(person.hobby)
// person.age=23;
