Vue3编写简单的App组件(二)

一、Vue3页面渲染基本流程

1、入口文件

<!DOCTYPE html>
<html lang="en"><head><meta charset="UTF-8"><link rel="icon" href="/favicon.ico"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>Vite App</title>
</head><body><div id="app"></div><script type="module" src="/src/main.ts"></script>
</body></html>

2、main.ts

//引入CreateApp用于创建应用
import { createApp } from "vue";
// 引入App根组件
import App from './App.vue'createApp(App).mount('#app')

3、App.vue

一个Vue文件包含三部分:template(用来写html,搭建网页结构)、script(用来写js或ts,实现动态交互)和style(用来写css,实现网页样式)

<template><!-- 写html --><div class="app"><h1>你好啊!</h1></div></template><script lang="ts">// 写js或者tsexport default {name: 'App' //组件名}</script><style>/* 写样式 */.app {background-color: #ddd;box-shadow: 0 0 10px;border-radius: 10px;padding: 20px;}
</style>

4、启动项目

二、实现一个复杂点的效果

1、Person.vue

<template><div class="person"><h2>姓名：{{name}}</h2><h2>年龄：{{age}}</h2><button @click="changeName">修改名字</button><button @click="changeAge">修改年龄</button><button @click="showTel">查看联系方式</button></div>
</template><script lang="ts">export default {name:'Person',data(){return {name:'张三',age:18,tel:'13888888888'}},methods:{// 修改姓名changeName(){this.name = 'zhang-san'},// 修改年龄changeAge(){this.age += 1},// 展示联系方式showTel(){alert(this.tel)}}}
</script><style scoped>.person {background-color: skyblue;box-shadow: 0 0 10px;border-radius: 10px;padding: 20px;}button {margin: 0 5px;}
</style>

2、App.vue

<template><!-- 写html --><h1>我是Maple:</h1><div class="app"><h1>你好啊!</h1><Person /></div></template><script lang="ts">import Person from './components/Person.vue'// 写js或者tsexport default {name: 'App', //组件名components: { Person }}
</script><style>/* 写样式 */.app {background-color: #ddd;box-shadow: 0 0 10px;border-radius: 10px;padding: 20px;}
</style>

3、main.js

//引入CreateApp用于创建应用
import { createApp } from "vue";
// 引入App根组件
import App from './App.vue'createApp(App).mount('#app')

4、index.html

<!DOCTYPE html>
<html lang="en"><head><meta charset="UTF-8"><link rel="icon" href="/favicon.ico"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>Vite App</title>
</head><body><div id="app"></div><script type="module" src="/src/main.ts"></script>
</body></html>