配置路径别名，方便引用，不用写那么长

配置前:

import TodoList from '../../components/TodoList'

配置后(不用再关心文件层级关系):

import TodoList from 'components/TodoList'

在根目录下添加’vue.config.js’,
添加如下代码：

const path = require('path')
function resolve(dir) {
  return path.join(__dirname, dir)
}
module.exports = {
  lintOnSave: true,
  chainWebpack: config => {
    config.resolve.alias
      .set('@', resolve('src'))
      .set('assets', resolve('src/assets'))
      .set('components', resolve('src/components'))
      .set('layout', resolve('src/layout'))
  }
}

使用:

import TodoList from 'components/TodoList'