VUECLI3/4创建项目格式：

vue create vuecli2test

会出现以下提示：

1.选择配置方式

? Please pick a preset: Manually select features

2.选择自己需要的配置，空格选中或者反选

? Check the features needed for your project: Choose Vue version, Babel

3.选择vue版本

? Choose a version of Vue.js that you want to start the project with 2.x      

4.对应的配置单独生成还是放在package.json

? Where do you prefer placing config for Babel, ESLint, etc.? In dedicated config files

5.是否保存自己选择的配置

? Save this as a preset for future projects? Yes

6.设置保存的名称

? Save preset as: liudw

目录结构详解

自定义配置：起别名