为vue-router懒加载时下载js的过程中添加loading提示

const basicInfo = {
  path: '/user',
  ponent: resolve => require(['./basicInfo.vue'], resolve) 
}
//然后将这个basicInfo加入路由表中

resolve => require(['./basicInfo.vue'], resolve)

const basicInfo = {
  path: '/user',
  ponent: resolve => {
    [显示Loading]
    require(['./basicInfo.vue'], ponent => {
      [隐藏Loading]
      resolve(ponent)
    })
  }
};

import { Loading } from 'element-ui';
var unique;
export default {
  show() {
    let opt = {body: true, text: 'Loading...'};
    if(!unique) unique = Loading.service(opt);
  },
  resolve(resolve) {
    return function (ponent) {
      if (unique) {
        unique.close();
        unique = null;
      }
      resolve(ponent)
    }
  }
}
const basicInfo = {
  path: '/user',
  ponent: resolve => {
    spinRoute.show();
    require(['./basicInfo.vue'], spinRoute.resolve(resolve))
  }
};