1、安装vue-cli3/4
MacBookPro:elementui zhangxm$ npm install -g @vue/cli
npm WARN deprecated core-js@2.6.11: core-js@<3 is no longer maintained and not recommended for usage due to the number of issues. Please, upgrade your dependencies to the actual version of core-js@3.
/usr/local/bin/vue -> /usr/local/lib/node_modules/@vue/cli/bin/vue.js
> core-js@3.6.4 postinstall /usr/local/lib/node_modules/@vue/cli/node_modules/core-js
> node -e "try{require('./postinstall')}catch(e){}"
Thank you for using core-js ( https://github.com/zloirock/core-js ) for polyfilling JavaScript standard library!
The project needs your help! Please consider supporting of core-js on Open Collective or Patreon:
> https://opencollective.com/core-js
> https://www.patreon.com/zloirock
Also, the author of core-js ( https://github.com/zloirock ) is looking for a good job -)
+ @vue/cli@4.1.2
added 38 packages from 16 contributors, removed 24 packages and updated 158 packages in 138.231s
1）vue create project 或可视化创建vue ui
2）vue init webpack project
vue ui方式
1）build文件夹配置webpack，基础配置、开发环境配置、生产环境配置
2）config定义全局配置
3) 入口的配置文件变道public里面
vue-cli 3/4把项目结构精简了很多,集成了大部分的配置，
需要对webpack进行配置，要创建vue.config.js进行配置
