<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>sss</title>
</head>
<body>
<script type="text/javascript">
let a = {
name:"hhhh"
};
let b = {
url :"zzzzzzzzzzzzz"
};
Object.setPrototypeOf(a,b);
console.log(a);
/*
Objectname: "hhhh"
__proto__:
url: "zzzzzzzzzzzzz"
__proto__: Object
*/
</script>
</body>
</html>
原文：https://www.cnblogs.com/angdh/p/14828332.html