main.js 全局js引入核心代码
import Vue from  'vue'
import api from  './utils/config/api'  //要引入的js文件
Vue.prototype.$api=api
.... //其他代码

this .$api.member_index

import TableBox from  './components/mod/TableBox
  Vue.component(' TableBox',TableBox)    //第一个为全局注册的组件名称，第二个为全局注册的组件模版

import Vue from  'vue'    
import upperFirst from  'lodash/upperFirst'    
import camelCase from  'lodash/camelCase'    
const requireComponent = require.context(    
'./components/mod/' ,     // 组件所在目录  
false ,                   // 是否不引用子目录组件
   /_base-[\w-]+\.vue$/     //通过正则表达式指明引入的文件名类型，比如以 _base- 开头的vue组件
)    
// For each matching file name...    
requireComponent.keys().forEach(fileName => {    
// Get the component config    
const componentConfig = requireComponent(fileName)    
// Get the PascalCase version of the component name    
const componentName = upperFirst(    
camelCase(    
fileName    
// Remove the "./_" from the beginning    
.replace(/^\.\/_/,  '' )    
// Remove the file extension from the end    
.replace(/\.\w+$/,  '' )    
)    
)    
// Globally register the component    
Vue.component(componentName, componentConfig. default  || componentConfig)    
})