chuck
/
es6-11study


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        const AAA = 'hihihi';
        //必须有初始值
        //不可重复定义
        //一般常量使用大写
        //常量值不可修改
        //块级作用域
        {
            const BBB = 'hello';
        }
        //对于数组和对象的元素修改，不算对常量的修改，不会报错
        const TEAM = ['a','b','c'];  //由于地址没有发生改变，不会报错，对象亦如此
        TEAM.push('d');
        console.log(TEAM);
    </script>
</body>
</html>