lovecoding
/
vipAllDay


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <div id="app">
        <ul v-for="(item,index) in arr" :key="index">
            <li>
              {{index+1}}--我叫{{item.name}}--今年{{item.age}}--是个{{item.sex}}孩
            </li>
          </ul>
          <button @click="changeDate">修改第二条数据</button@>
    </div>
    <script src="./vue.js"></script>
    <script>
      var vm = new Vue({
        data: {
          arr: [
            {
              name: "Lucy",
              age: 11,
              sex: "女",
            },
            {
              name: "LiLi",
              age: 31,
              sex: "男",
            },
            {
              name: "八戒",
              age: 21,
              sex: "男",
            },
            {
              name: "八卦",
              age: 23,
              sex: "男",
            },
            {
              name: "孙悟空",
              age: 27,
              sex: "男",
            },
            {
              name: "唐僧",
              age: 33,
              sex: "女",
            },
          ],
        },
        methods: {
            changeDate() {
                // 数据更新 视图未渲染
                // this.arr[1] = {name:"哪吒", age:3,sex:"男"}
                // console.log(this.arr,'新数据')
                // 第一种 Vue.set(target,index/name,obj)
                // Vue.set(this.arr,1,{name:"哪吒", age:3,sex:"男"})
                // 第二种 this.$set(target,index/name,obj)
                this.$set(this.arr,1,{name:"哪吒", age:3,sex:"男"})
            }
        },
      }).$mount("#app");
    </script>
  </body>
</html>