# vue3-demo
#### Project setup
```
npm install
```
##### Compiles and hot-reloads for development
```
npm run serve
```
#### Compiles and minifies for production
```
npm run build
```
#### Lints and fixes files
```
npm run lint
```
#### 正文
***
#### 版本
***
> node v12.16.2
> npm 6.14.9
#### 完整的package.json
***
```
{
"name": "vue3-demo",
"version": "0.1.0",
"private": true,
"scripts": {
"serve": "vue-cli-service serve",
"build": "vue-cli-service build",
"lint": "vue-cli-service lint"
},
"dependencies": {
"core-js": "^3.6.5",
"vue": "^3.0.0",
"vue-router": "^4.0.1"
},
"devDependencies": {
"@vue/cli-plugin-babel": "~4.5.0",
"@vue/cli-plugin-eslint": "~4.5.0",
"@vue/cli-service": "~4.5.0",
"@vue/compiler-sfc": "^3.0.0",
"ant-design-vue": "^2.0.0-rc.5",
"autoprefixer": "^9.8.6",
"babel-eslint": "^10.1.0",
"eslint": "^6.7.2",
"eslint-plugin-vue": "^7.0.0-0",
"postcss": "^8.2.1",
"postcss-loader": "^4.1.0",
"sass": "^1.30.0",
"sass-loader": "^10.1.0",
"vuex": "^4.0.0-rc.2"
},
"eslintConfig": {
"root": true,
"env": {
"node": true
},
"extends": [
"plugin:vue/vue3-essential",
"eslint:recommended"
],
"parserOptions": {
"parser": "babel-eslint"
},
"rules": {}
},
"browserslist": [
"> 1%",
"last 2 versions",
"not dead"
]
}
```
#### 1. 初始化项目
***
1.1 使用Vue3,需要升级vue-cli,全局安装最先版本@vue/cli;
```
npm install -g @vue/cli@next
```
1.2 安装成功后输入,显示,安装成功
```
$ vue -V
@vue/cli 4.5.4
```
1.3 安装成功Vue cli 4, 使用下面命令创建vue3项目;
```
vue create vue3-demo
```
运行:在`Manually select features` 输入Vue 3选择vue3版本;
```
? Please pick a preset: (Use arrow keys)
> true ([Vue 2] dart-sass, babel, typescript, router, vuex, unit-mocha, e2e-cypr
ess)
Default ([Vue 2] babel, eslint)
Default (Vue 3 Preview) ([Vue 3] babel, eslint)
Manually select features Vue 3
```
![image.png](https://segmentfault.com/img/bVcLCXx)
1.4 启动服务
```
cd vue3-demo //进入文件
npm run serve // 运行项目
```
使用网络浏览器转到:`http://localhost:8080/`,如图
![image.png](https://segmentfault.com/img/bVcLC1E)
1.4 项目文件列表
```
├─.gitignore
├─ .git
├─ node_modules
├─babel.config.js
├─package-lock.json
├─package.json
├─README.md
├─src
| ├─App.vue
| ├─main.js
| ├─components
| | └HelloWorld.vue
| ├─assets
| | └logo.png
├─public
| ├─favicon.ico
| └index.html
```
#### 2. 配置PostCSS
***
PostCSS 插件转换 CSS 代码的工具,增加代码的可读性。利用从 Can I Use 网站获取的数据为 CSS 规则添加特定厂商的前缀。
[Autoprefixer](https://github.com/postcss/autoprefixer) 自动获取浏览器的流行度和能够支持的属性,并根据这些数据帮你自动为 CSS 规则添加前缀。
2.1 安装 postcss、postcss-loader、autoprefixer插件;
```
npm i postcss postcss-loader autoprefixer@9.8.6 -D
```
`autoprefixer`使用9.8.6版本主要是与`postcss`的兼容性问题,`autoprefixer`默认使用最新版本。
2.2 在`vue3-demo`项目下创建`postcss.config.js`文件;
```
//创建 postcss.config.js
touch postcss.config.js
// postcss.config.js
module.exports = {
plugins: [
// 配置 Autoprefixer 插件
require('autoprefixer')({
// 游览器最近的两个版本
'overrideBrowserslist': ['last 2 versions']
})
],
};
```
2.3 在`App.vue` 中输入下面代码,重新运行:
```
<template>
<div>123</div>
</template>
<script>
export default {
name: 'App',
components: {
}
}
</script>
<style scoped>
div {
display: flex;
}
</style>
```
通过游览器查看输出:
```
div {
display: -webkit-box;
display: -ms-flexbox;
display: flex;
}
```
#### 3. 配置Css 预处理语言 —— Sass
3.1 使用下面命令安装 Sass;
```
npm install sass sass-loader -D
```
3.2 安装好了sass,那我们就在`App.vue`中使用Sass;
```
<!-- App.vue -->
<template>
<div>123</div>
</template>
<script>
export default {
name: 'App',
components: {
}
}
</script>
<style lang="scss" scoped>
$color: #f00;
div {
display: flex;
color: $color,
}
</style>
```
这里我们可以在页面上,文字已经是红色了。
#### 4. 配置UI组件库
***
4.1 使用下面命令按装UI组件`ant-design-vue@next`,`ant-design-vue`组件已经支持 `Vue3`;
```
npm i ant-design-vue@next -D
```
4.2 在`main.js` 中, 全局引入`ant-design-vue`组件库
```
// main.js
import { createApp } from 'vue'
import App from './App.vue'
import Antd from 'ant-design-vue'
import 'ant-design-vue/dist/antd.css'
const app = createApp(App)
app.use(Antd)
app.mount('#app')
```
4.3 在`App.vue`中引入`ant-design-vue`组件;
```
<template>
<a-layout id="components-layout-demo-custom-trigger">
<a-layout-sider v-model:collapsed="collapsed" :trigger="null" collapsible>
<div class="logo" />
<a-menu theme="dark" mode="inline" v-model:selectedKeys="selectedKeys">
<a-menu-item key="home">
<HomeOutlined />
<span>Home</span>
</a-menu-item>
<a-sub-menu key="sub1">
<template #title>
<span>
<user-outlined />
<span>User</span>
</span>
</template>
<a-menu-item key="user"> Tom</a-menu-item>
</a-sub-menu>
</a-menu>
</a-layout-sider>
<a-layout>
<a-layout-header style="background: #fff; padding: 0">
<menu-unfold-outlined v-if="collapsed" class="trigger" @click="() => (collapsed = !collapsed)" />
<menu-fold-outlined v-else class="trigger" @click="() => (collapsed = !collapsed)" />
</a-layout-header>
<a-layout-content class="main">
<router-view></router-view>
</a-layout-content>
</a-layout>
</a-layout>
</template>
<script>
import {
UserOutlined,
HomeOutlined,
MenuUnfoldOutlined,
MenuFoldOutlined
} from '@ant-design/icons-vue';
export default {
components: {
UserOutlined,
HomeOutlined,
MenuUnfoldOutlined,
MenuFoldOutlined
},
data() {
return {
selectedKeys: ['home'],
collapsed: false,
};
},
methods: {
}
};
</script>
<style lang="scss" scoped>
#components-layout-demo-custom-trigger {
height: 100vh;
.trigger {
font-size: 18px;
line-height: 64px;
padding: 0 24px;
cursor: pointer;
transition: color 0.3s;
&:hover {
color: #1890ff;
}
}
.logo {
height: 32px;
background: rgba(255, 255, 255, 0.2);
margin: 16px;
}
}
.main {
margin: 24px 16px;
padding: 24px;
background: #fff;
height: calc(100% - 64px);
}
</style>
```
#### 5. 配置路由 vue-router
5.1 下载安装`vue-router`
```
npm install vue-router@4
```
5.2 安装成功后,在`src`中创建`views` 文件夹,并且创建`home.vue``user.vue`两个文件;
`home.vue`文件
```
<template>
Home
</template>
```
`user.vue`文件
```
<template>
User
</template>
```
5.3 在`src`中创建`router` 文件夹,并且创建`index.js`文件
```
import {
createRouter,
createWebHashHistory
} from 'vue-router'
const Home = ()=> import('./../views/home.vue')
const User = ()=> import('./../views/user.vue')
const routes = [{
path: '/home',
name: 'home',
component: Home
},
{
path: '/user',
name: 'user',
component: User
},
{
path: '/',
redirect: '/home',
component: Home
}
]
export default createRouter({
history: createWebHashHistory(),
routes
});
```
5.4 在 `main.js` 中引用 `vue-router`;
```
//main.js
import router from './router/index.js'
...
app.use(router)
```
5.5 在`App.vue` 中第5中添加方法`menuClick`;
`<a-menu theme="dark" mode="inline" v-model:selectedKeys="selectedKeys" @click="menuClick">`
实现路由跳转,在methods 中添加方法`menuClick`
```
methods: {
menuClick(e) {
// 路由跳�