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浅拷贝实现方式3concat220331.html

<!--
 * @Author: your name
 * @Date: 2022-03-31 17:42:36
 * @LastEditTime: 2022-03-31 17:44:17
 * @LastEditors: your name
 * @Description: 打开koroFileHeader查看配置 进行设置: https://github.com/OBKoro1/koro1FileHeader/wiki/%E9%85%8D%E7%BD%AE
 * @FilePath: \geyao\geyao\浅拷贝实现方式3concat.html
-->
<!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>concat</title>
</head>

<body>
  <script>
    let arr = [1, 3, {
      username: '歌谣'
    }];
    let arr2 = arr.concat();
    arr2[2].username = '方方';
    console.log(arr); //[ 1, 3, { username: '方方' } ]
  </script>
</body>

</html>