lovecoding
/
VIP26


			
				
					
						
						
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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>
            <li v-for="(item,index) of person" :key="index">
                {{item.name}}--{{item.age}}--{{item.sex}}
            </li>
        </ul>
        <button @click="updateMsg">修改</button>
    </div>
    <script src="./vue.js"></script>
    <script>
        var app = new Vue({
            el:'#app',
            data:{
                person:[
                    {
                        name:"LiLi",
                        age: 19,
                        sex: '女'
                    },
                    {
                        name:"Ming",
                        age: 29,
                        sex: '男'
                    },
                    {
                        name:"Lucy",
                        age: 99,
                        sex: '女'
                    },
                    {
                        name:"马冬梅",
                        age: 98,
                        sex: '女'
                    },
                ],
            },
            methods: {
                // vue 响应式原理 => Object.defineProperty(getter/setter)
                // 数据监听 => 数据与视图的更新
                // Vue.set(target,propertyName/index,value)
                // (app实例).$set(target,propertyName/index,value)
                updateMsg() {
                    // this.person[1] = {name:"马琛",age: 20,sex:'男'}
                    this.$set(this.person,1,{name:"马琛",age: 20,sex:'男'})
                    // Vue.set(this.person,1,{name:"马琛",age: 20,sex:'男'})
                }
            },
        })
    </script>
</body>
</html>