<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>js链式操作</title>
</head>
<body>
<script>
function A() {
this.num = 2
}
A.prototype.set = function (num) {
this.num = num;
return this; //将调用的对象返回就可以继续调用该对象里面的方法和对象了，即链式调用
}
A.prototype.get = function () {
console.log(this.num);
return this;
}
var B = new A();
B.get().set(6).get();
class Jack {
constructor(x) {
this.x = x;
}
get() {
console.log(this.x);
return this;
}
set(x) {
this.x = x;
return this;
}
}
let j = new Jack(1);
j.get().set(6).get();
</script>
</body>
</html>
