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@@ -0,0 +1,69 @@
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+<!DOCTYPE html>
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+<html lang="en">
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+ <head>
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+ <meta charset="UTF-8" />
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+ <meta name="viewport" content="width=device-width, initial-scale=1.0" />
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+ <title>Document</title>
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+ </head>
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+ <body>
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+ <div id="app">
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+ <div v-for="(item,index) in arr" :key="index">
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+ {{item.name}}--{{item.age}}--{{item.sex}}
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+ </div>
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+ <button @click="getNews">修改数据</button>
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+ </div>
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+ <script src="./vue.js"></script>
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+ <script>
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+ var app = new Vue({
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+ data: {
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+ arr: [
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+ {
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+ name: "Lucy",
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+ age: 11,
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+ sex: "女",
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+ },
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+ {
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+ name: "LiLi",
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+ age: 31,
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+ sex: "男",
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+ },
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+ {
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+ name: "八戒",
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+ age: 21,
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+ sex: "男",
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+ },
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+ {
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+ name: "八卦",
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+ age: 23,
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+ sex: "男",
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+ },
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+ {
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+ name: "孙悟空",
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+ age: 27,
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+ sex: "男",
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+ },
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+ {
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+ name: "唐僧",
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+ age: 33,
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+ sex: "女",
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+ }
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+ ],
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+ },
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+ methods: {
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+ getNews() {
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+ // 数据修改 视图未更新
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+ // Object.defineProperty 中的getter和setter去对数据进行设置和修改
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+ console.log("修改")
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+ // this.arr[2] = {name:"小郑",age: 20,sex:"女"}
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+ // 第一种写法
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+ // Vue.set(target,index/name,obj)
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+ Vue.set(this.arr,1,{name:"小郑",age: 20,sex:"女"})
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+ // 第二种写法
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+ this.$set(this.arr,2,{name:"小李",age: 24,sex:"男"})
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+ console.log(this.arr)
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+ }
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+ },
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+ }).$mount("#app");
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+ </script>
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+ </body>
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+</html>
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