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JS学习之 解构赋值
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解构赋值

解构赋值包含数组解构、对象解构、函数解构赋值

  1. <!DOCTYPE html>
  2. <html lang="en">
  3.   <head>
  4.     <meta charset="UTF-8" />
  5.     <meta http-equiv="X-UA-Compatible" content="IE=edge" />
  6.     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  7.     <title>数组解构</title>
  8.   </head>
  9.   <body></body>
  10.   <script>
  11.     // 数组解构
  12.     let [name, age] = ["张峰", "33岁"];
  13.     console.log(name, age);
  14.     //迭代更新
  15.     [name, age] = ["老王", "44岁"];
  16.     console.log(name, age);
  17.     //参数不足添加默认值,参数过多,归并参数,用...
  18.     [a, b, c, d, e, ...f] = [1, 2, 4, 5, 6, 7, 8, 9];
  19.     console.log(a, b, c, d, e, f);
  20.     // 对象解构不用let时,等号左边禁止出现大括号,必须使用大括号时
  21.     // 用括号包住转为表达式
  22.     ({ name, age } = { name: "张峰", age: "33岁" });
  23.     console.log(name, age);
  24.     // 函数解构传参
  25.     function getUser({ name, age }) {
  26.       console.log(name, age);
  27.     }
  28.     getUser({ name: "老吴", age: "66岁" });
  29.   </script>
  30. </html>

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Correcting teacher：PHPzPHPz

Correction status：qualified

Teacher's comments：
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