lovecoding
/
web0331


			
				
					
						
						
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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">

        <div v-for="(item,index) in arr" :key="index">
            {{index + 1}}.我叫{{item.name}}--今年{{item.age}}了--我是{{item.sex}}孩
        </div>
        <button @click="changeDate">修改数据</button>
    </div>
    <script src="./vue.js"> </script>
    <script>
        var vm = new Vue({
            el: "#app",
            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() {
                    // let obj = {
                    //     name:'哪吒',
                    //     age: 7,
                    //     sex: "男"
                    // }
                    // this.arr[2] = obj;
                    // 数据改变 视图未变
                    // Vue.set(this.arr,2,{
                    //     name:'哪吒',
                    //     age: 7,
                    //     sex: "男"
                    // })
                    this.$set(this.arr,2,{
                        name:'哪吒',
                        age: 7,
                        sex: "男"
                    })
                    console.log(this.arr)
                    // Vue.set(target,index/name,newObj)
                    // this.$set(target,index/name,newObj)
                }
            }
        })
    </script>
</body>

</html>