版权声明：进击的葱 https://blog.csdn.net/qlwangcong518/article/details/86317329
描述：
JS——级联的分析
实现：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<script>
class Box{
constructor(){
}
a(){
console.log("a");
return this;
}
b(){
console.log("b");
return this;
}
c(){
console.log("c");
return this;
}
}
// let box=new Box();
// box.a().b().c();
new Box().b().a().c();
</script>
</body>
</html>