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>rest</title>
</head>
<body>
    <div></div>
    <div></div>
    <script>
        /**
         * 扩展运算应用
         */
        //1 数组合并
        const aa = [1,2,3]
        const bb = [3,4,5]
        const cc = [...aa,...bb]
        console.log(cc)  //1,2,3,3,4,5

        //2 数组克隆 -- 注意仅支持浅拷贝
        const dd = [6,7,8,9]
        const ee = [...dd]
        console.log(ee) // [6,7,8,9]

        //3 将伪数组转换正数组
        const divs = document.querySelectorAll('div')
        console.log(divs)
        const divArr = [...divs]
        console.log(divArr)
        //arguments也是伪数组，可以转换
    </script>
</body>
</html>