VUEはthis.$set配列内の値を変更する
10235 ワード
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta
name="viewport"
content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no"
/>
<meta http-equiv="X-UA-Compatible" content="ie=edge" />
<script src="https://cdn.suoluomei.com/common/js2.0/vue/v2.5.16/vue.js">script>
<title> title>
<style>
* {
margin: 0;
padding: 0;
}
style>
head>
<body>
<div id="vue">
<div id="app">
<p v-for="item in items" :key="item.id">{{item.message}}p>
div>
div>
body>
<script>
new Vue({
el: "#vue",
data: {
items: [
{ message: "one", id: "1" },
{ message: "two", id: "2" },
{ message: "three", id: "3" },
],
},
methods: {},
mounted() {
let that = this;
// this.items[0] = { message: "first", id: "4" }; // ，
let art = { message: "first", id: "4" };
this.$set(this.items, 0, art); //$set
},
});
script>
html>