webpack的 rquire.context用法实现工程自动化的方法

//main.js
import global from './utils/global'
Vue.use(global)
//解释:如果自动化的代码直接写在一个js文件中直接全局的引入main.js 中也是没有问题的,
//但是这里是按照自定义插件的方式写下global文件中的就要使用vue的use方法

//global.js
import {
 Input,
 Dialog,
} from "element-ui"
import VueLazyload from "vue-lazyload"
import Meta from 'vue-meta'
import * as utils from "./index"

export default {
 install(Vue) {
 const requireComponent = require.context(
  "@/base",
  true,
  /[a-z0-9]+\.(jsx?|vue)$/i,
 )
 //console.log(requireComponent);
 //console.log(requireComponent.keys(),)
 //console.log(requireComponent.resolve,)
 //console.log(requireComponent.id,)
 //console.log(requireComponent.resolve("./tabs.vue"))
 //console.log(requireComponent("./tabs.vue"));
 //console.log(requireComponent("./tabs.vue") === require("@/base/tabs"));

 
 // 批量注册base组件
 requireComponent.keys().forEach(fileName => {
  const componentConfig = requireComponent(fileName)
  const componentName = componentConfig.default.name
  if (componentName) {
   Vue.component(componentName, componentConfig.default ||   
    componentConfig)
  }
 })
 
 Vue.prototype.$ELEMENT = { size: "small" }
 Vue.prototype.$utils = utils

 Vue.use(Input)
 Vue.use(Dialog)
 Vue.use(Meta)
 },
}

const requireComponent = require.context(
  "@/base",
  true,
  /[a-z0-9]+\.(jsx?|vue)$/i,
 )

require.context(directory, useSubdirectories, regExp);