ES6-ES11 ES9扩展运算符与rest参数

视频
<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>对象展开</title>
</head>

<body>
    <!-- 
        Rest 参数与 spread 扩展运算符在 ES6 中已经引入，不过 ES6 中只针对于数组，
        在 ES9 中为对象提供了像数组一样的 rest 参数和扩展运算符
     -->
    <script>
        //rest 参数
        function connect({host, port, ...user}){
            console.log(host);
            console.log(port);
            console.log(user);
        }

        connect({
            host: '127.0.0.1',
            port: 3306,
            username: 'root',
            password: 'root',
            type: 'master'
        });


        //对象合并
        const skillOne = {
            q: '天音波'
        }

        const skillTwo = {
            w: '金钟罩'
        }

        const skillThree = {
            e: '天雷破'
        }
        const skillFour = {
            r: '猛龙摆尾'
        }

        const mangseng = {...skillOne, ...skillTwo, ...skillThree, ...skillFour};

        console.log(mangseng)

        // ...skillOne   =>  q: '天音波', w: '金钟罩'

    </script>

</body>

</html>
posted on 2023-03-09 11:18 垂序葎草阅读(12) 评论(0) 编辑收藏举报