12.new variable name.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    <script>
    const user = { name: 'John Doe', age: 34 };
    const {name:userName,age:userAge} = user;
    // ({ a, b } = { a: "baz", b: 101 });
    </script>
</body>
</html>