1.数组对象

代码块

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
</head>
<body>
<script>
  let object = {
      name : '123',
      sex : '男'
  }
  let arr = [1,2,3];
  object.name = 321;
  console.table([object]);
  console.table(arr);
</script>
</body>
</html>

效果图

2.传参解构

数组解构

代码块

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
</head>
<body>
<script>
  let arr = [1,2,3,4,5];
  let [,,a,b,c,,] = arr;
  let fun = (a,b,c) => {
      console.table([a,b,c]);
  }
  fun(a,b,c);
  [a,c] = [c,a];
  console.table([a,c]);
</script>
</body>
</html>

效果图

对象解构

代码块

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>对象解构</title>
</head>
<body>
<script>
    let obj = {id : 10, name : '手机'};
    ({id,name} = obj);
    console.log(id,name);
    let getUser = ({id,name}) => [name,id];
    console.log(getUser({id,name}));
</script>
</body>
</html>

效果图

3.访问器属性的set和get

代码块

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>访问器属性</title>
</head>
<body>
<script>
    const product = {
        data:[
            {id:1,name:'电脑',price:5000,num:5}
        ],
        get total(){
            return this.data.reduce((t,c) => (t += c.price * c.num),0);
        }
    }
    console.log(product.total);
   let user = {
        data : {name},
       // 读
       get name() {
            return this.data.name;
       },
       // 写
       set name(v) {
            this.data.name = v;
       },
   }
    user.name = '手机';
   console.log(user.name)
</script>
</body>
</html>

效果图

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2021-05-07 22:53:35