lovecoding
/
VIP22


			
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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>
  <ul>
    <li>1</li>
    <li>2</li>
    <li>3</li>
  </ul>
  <script>
    /* ...扩展运算符  把数组或者类数组展开成用逗号分隔开的值 */
    // var a = [1,2,3]
    // var b = [...a]
    // b[0] = 8
    // console.log(b)
    // console.log(a)

    // var c = [1,2,3]
    // var d = c
    // d[0] = 9
    // console.log(c,d)

    // var e = [1,2,3]
    // console.log(...e)


    //合并
    var a = [1,2,3]
    var b = [4,5,6]
    var e = [...a,...b,7,8,9]
    console.log(e)

    var aLi = document.getElementsByTagName('li')
    console.log(aLi)
    /* ... 把类数组转数组 */
    var arr = [...aLi]
    console.log(arr)


    arr.push(11)
    console.log(arr)
  </script>
</body>
</html>