vue2一次注册多个全局组件

require.context(directory,useSubdirectories,regExp)

1. directory:表示检索的目录
2. useSubdirectories：表示是否检索子文件夹
3. regExp:匹配文件的正则表达式,一般是文件名
4. 例如 require.context("@/views/components",false,/.vue$/)

1、常常用来在组件内引入多个组件。

const path = require('path')
const files = require.context('@/components/home', false, /\.vue$/)
const modules = {}
files.keys().forEach(key => {
  const name = path.basename(key, '.vue')
  modules[name] = files(key).default || files(key)
})
export default{
    ...
    components:modules
}

2、在main.js中引入大量公共组件 

const globalCmp = [];

//导入自己封装的基础组件和页面通用组件
const context = require.context('./base', true, /\.vue$/);
context.keys().forEach((key) => {
  const cmp = context(key).default;
  globalCmp.push(cmp);
});
const context2 = require.context('./common', true, /\.vue$/);
context2.keys().forEach((key) => {
  const cmp = context2(key).default;
  globalCmp.push(cmp);
});

//全局组件注册
globalCmp.forEach((cmp) => {
  Vue.component(cmp.name, cmp);
});