VueCli3 @路径设置

1.最外层目录创建文件vue.config.js
2.加入如下代码

let path = require('path')
function resolve (dir) {
  return path.join(__dirname, dir)
}
module.exports = {
  chainWebpack: config => {
    config.resolve.alias
      .set('@', resolve('src')) 
  }
}