摘自黑马程序员Springboot+Vue3
**Vue会完全接管挂载的元素，并对其进行动态渲染。**不要对Vue接管的元素进行更改
我可以把createApp想像成一个摸具，挂载后称为一个实例对象，methods是这个对象的方法，data是对象的属性，因此我们可以直接用this调用方法和属性
step1：挂载元素
step2：设置插值表达式
step3：调用data函数返回数据
列表渲染
html
<body>
<div id="app">
<table border="1 solid" colspa="0" cellspacing="0">
<tr>
<th>文章标题</th>
<th>分类</th>
<th>发表时间</th>
<th>状态</th>
<th>操作</th>
</tr>
<tr v-for="(article,index) in articleList">
<td>{{article.title}}</td>
<td>{{article.category}}</td>
<td>{{article.time}}</td>
<td>{{article.state}}</td>
<td>
<button>编辑</button>
<button>删除</button>
</td>
</tr>
<!-- <tr>
<td>标题2</td>
<td>分类2</td>
<td>2000-01-01</td>
<td>已发布</td>
<td>
<button>编辑</button>
<button>删除</button>
</td>
</tr>
<tr>
<td>标题3</td>
<td>分类3</td>
<td>2000-01-01</td>
<td>已发布</td>
<td>
<button>编辑</button>
<button>删除</button>
</td>
</tr> -->
</table>
</div>
<script type="module">
//导入vue模块
import { createApp } from
'https://unpkg.com/vue@3/dist/vue.esm-browser.js'
//创建应用实例
createApp({
data() {
return {
articleList: [
{
title: "医疗反腐绝非砍医护收入",
category: "时事",
time: "2023-09-5",
state: "已发布"
},
{
title: "中国男篮缘何一败涂地？",
category: "篮球",
time: "2023-09-5",
state: "草稿"
},
{
title: "华山景区已受大风影响阵风达7-8级，未来24小时将持续",
category: "旅游",
time: "2023-09-5",
state: "已发布"
}
]
}
}
}).mount("#app")//控制页面元素
</script>
</body>动态绑定元素
html
<!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">
<a v-bind:href="url">黑马官网</a>
</div>
<script type="module">
//引入vue模块
import { createApp} from
'https://unpkg.com/vue@3/dist/vue.esm-browser.js'
//创建vue应用实例
createApp({
data() {
return {
url: "https://www.baidu.com"
}
}
}).mount("#app")//控制html元素
</script>
</body>
</html>条件渲染
v-if是决定是否创建，v-show全都创建但选择显示
事件绑定
html
<!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">
<button v-on:click="money">点我有惊喜</button>
<button @click="love">再点更惊喜</button>
</div>
<script type="module">
//导入vue模块
import { createApp} from 'https://unpkg.com/vue@3/dist/vue.esm-browser.js'
//创建vue应用实例
createApp({
data() {
return {
//定义数据
}
},
methods: {
money(){
alert("送你钱100")
},
love(){
alert("爱你一万年")
}
},
}).mount("#app");//控制html元素
</script>
</body>
</html>双向绑定
html
<!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">
文章分类: <input type="text" v-model="searchConditions.category"/> <span>{{searchConditions.category}}</span>
发布状态: <input type="text" v-model="searchConditions.state"/> <span>{{searchConditions.state}}</span>
<button>搜索</button>
<button @:click="clear">清空</button>
<br />
<br />
<table border="1 solid" colspa="0" cellspacing="0">
<tr>
<th>文章标题</th>
<th>分类</th>
<th>发表时间</th>
<th>状态</th>
<th>操作</th>
</tr>
<tr v-for="(article,index) in articleList">
<td>{{article.title}}</td>
<td>{{article.category}}</td>
<td>{{article.time}}</td>
<td>{{article.state}}</td>
<td>
<button>编辑</button>
<button>删除</button>
</td>
</tr>
</table>
</div>
<script type="module">
//导入vue模块
import { createApp } from 'https://unpkg.com/vue@3/dist/vue.esm-browser.js'
//创建vue应用实例
createApp({
data() {
return {
//定义数据
articleList: [{
title: "医疗反腐绝非砍医护收入",
category: "时事",
time: "2023-09-5",
state: "已发布"
},
{
title: "中国男篮缘何一败涂地？",
category: "篮球",
time: "2023-09-5",
state: "草稿"
},
{
title: "华山景区已受大风影响阵风达7-8级，未来24小时将持续",
category: "旅游",
time: "2023-09-5",
state: "已发布"
}],
searchConditions: {
category: '',
state: ''
}
}
},
methods: {
clear(){
this.searchConditions.category='';
this.searchConditions.state='';
}
},
}).mount("#app")
</script>
</body>
</html>Vue声明周期
总的来说就是：创建 挂载 更新 销毁（通常只用挂载）
我们想要在指定生命周期进行操作就调用生命周期的函数就行
javascript
createApp({
beforeCreate() {
console.log("hello")
},
mounted() {
console.log("mounted")
},
}).mount("#app")