Vue3 安装简单应用

   现在官方推荐使用 create-vue 来创建基于 Vite 的新项目→         快速上手 | Vue.js

1、安装VueCLi     vue.js 开发工具   网站：     Vue CLI  去官网看教程   

cmd 运行命令 安装       

npm install -g @vue/cli 或者 cnpm install -g @vue/cli  下载速度快一点   等待安装即可；

查看安装版本  vue -V     --->           @vue/cli 5.0.8

2、创建项目   vue create vue-demo             （项目名不能有大写）

操作： 选择：上 下键，选中：空格键，回车确认 下一步操作

? Please pick a preset:        选 > Manually select features
  Default ([Vue 3] babel, eslint)
  Default ([Vue 2] babel, eslint)
> Manually select features

Vue CLI v5.0.8         选 >(*) Babel    和     (*) Progressive Web App (PWA) Support
? Please pick a preset: Manually select features
? Check the features needed for your project: (Press to select, to toggle all, to invert selection, and to proceed)
>(*) Babel
 ( ) TypeScript
 (*) Progressive Web App (PWA) Support
 ( ) Router
 ( ) Vuex
 ( ) CSS Pre-processors
 ( ) Linter / Formatter
 ( ) Unit Testing
 ( ) E2E Testing

----

Vue CLI v5.0.8     选   > 3.x
? Please pick a preset: Manually select features
? Check the features needed for your project: Babel, PWA
? Choose a version of Vue.js that you want to start the project with (Use arrow keys)
> 3.x
  2.x

----

Vue CLI v5.0.8        选 > In dedicated config files
? Please pick a preset: Manually select features
? Check the features needed for your project: Babel, PWA
? Choose a version of Vue.js that you want to start the project with 3.x
? Where do you prefer placing config for Babel, ESLint, etc.? (Use arrow keys)
> In dedicated config files
  In package.json

----

Vue CLI v5.0.8         选        n  是否保存为默认行为
? Please pick a preset: Manually select features
? Check the features needed for your project: Babel, PWA
? Choose a version of Vue.js that you want to start the project with 3.x
? Where do you prefer placing config for Babel, ESLint, etc.? In dedicated config files
? Save this as a preset for future projects? (y/N) n
----等待项目创建完成

 Successfully created project vue-demo.
 Get started with the following commands:

 $ cd vue-demo
 $ npm run serve

3、运行项目             

1、       cd 到 文件目录 vue-demo        

2、       运行         npm run serve       

  App running at:         运行成功
  - Local:   http://localhost:8080/
  - Network: http://192.168.1.4:8080/

  Note that the development build is not optimized.
  To create a production build, run npm run build.
3、停止运行        CtrL +C                y