把html部分粘贴出去可以直接测试了。
对函数做统一的拦截，统一对所有实例对象的方法做统一处理的场合使用该方法。
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<h1>实例对象的函数批量劫持</h1>
<script>
class Per{
sayHi=(str)=>{
console.log('sayHi-------------99999', str);
}
fly=(data)=>{
console.log('fly-------------99999', data);
}
hehe=(a,b)=>{
console.log('hehe-------------99999',a,b);
}
haha=(a,b,c)=>{
console.log('haha-------------99999',a,b,c);
}
}
class Person extends Per{
constructor(name, age){
super(name, age);
this.name = name;
this.age = age;
}
}
// InstanceObject 实例对象：要求是 new 出来的。
// 对函数做统一的拦截，添加统一日志使用
const hijackingFunc = (InstanceObject)=>{
return new Proxy(InstanceObject, {
get(target, prop, receiver) {
const origMethod = target[prop];
if (typeof origMethod === "function") {
return function (...args) {
// prop 就是函数名，
console.log(`Method '${prop}' called with args: `,JSON.stringify(args) );
const result = origMethod.apply(this, args);
return result;
};
} else {
return origMethod;
}
},
});
}
const proxy = hijackingFunc(new Person("Tom", 18))
proxy.sayHi('sssss');
proxy.fly({a:1,b:2});
proxy.hehe('a', 'b');
proxy.haha('a','s', 'w');
</script>
</body>
</html>
js部分
class Per{
sayHi=(str)=>{
console.log('sayHi-------------99999', str);
}
fly=(data)=>{
console.log('fly-------------99999', data);
}
hehe=(a,b)=>{
console.log('hehe-------------99999',a,b);
}
haha=(a,b,c)=>{
console.log('haha-------------99999',a,b,c);
}
}
class Person extends Per{
constructor(name, age){
super(name, age);
this.name = name;
this.age = age;
}
}
// InstanceObject 实例对象：要求是 new 出来的。
// 对函数做统一的拦截，添加统一日志使用
const hijackingFunc = (InstanceObject)=>{
return new Proxy(InstanceObject, {
get(target, prop, receiver) {
const origMethod = target[prop];
if (typeof origMethod === "function") {
return function (...args) {
// prop 就是函数名，
console.log(`Method '${prop}' called with args: `,JSON.stringify(args) );
const result = origMethod.apply(this, args);
return result;
};
} else {
return origMethod;
}
},
});
}
const proxy = hijackingFunc(new Person("Tom", 18))
proxy.sayHi('sssss');
proxy.fly({a:1,b:2});
proxy.hehe('a', 'b');
proxy.haha('a','s', 'w');
