<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>ES6基础知识</title>
</head>
<body>
    <script type="text/javascript">
        const person = {
            name:'peter',
            age:28
        };

        person.age = 30; //正确

        //错误
        person = {
            name: 'mike',
            age:20
        };

        const colors = ["red","green","blue"];
        colors[0] = 'yellow'; //正确
        colors = ["black","white"]; //错误


    </script>
</body>
</html>