<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<script>
function PersonA(){
this.dao = 'dao';
}
function PersonB(){
this.jd = 'jd';
}
function PersonC(){
this.ff = 'ff';
}
function Person(){
}
function extend(o,...arr){
if(arr.length == 0){
return o;
}
o.prototype = new arr[0]();
let p = o.prototype;
for(let i = 0;i < arr.length - 1;++i){
p.__proto__ = new arr[i + 1]();
p = p.__proto__;
}
}
extend(Person,PersonA,PersonB,PersonC);
let aa = new Person();
console.log(aa.dao,aa.jd,aa.ff);
</script>
</body>
</html>
