text: import { Loading } from 'element-ui'
  import NProgress from 'nprogress'
  import 'nprogress/nprogress.css'
  let loading = {
  }
  let loadingInstance = null
  
  let lastRequest = new Date('2018')
  
  loading.show = function (config) {
    if (config && config.loading) {
      let now = new Date()
      let ms = now - lastRequest
      lastRequest = now
      if (ms > config.loading.interval || 2000) { // 默认相隔超过两秒的请求才重新显示loading
        if (config.loading.type === 'loading') {
          loadingInstance = Loading.service(config.loading.options)
        } else if (config.loading.type === 'nprogress') {
          NProgress.start()
        }
      }
    }
  }
  
  loading.hide = function (config) {
    if (config && config.loading) {
      if (config.loading.type === 'loading' && loadingInstance) {
        loadingInstance.close()
        loadingInstance = null
      } else if (config.loading.type === 'nprogress') {
        NProgress.done()
      }
    }
  }
  
  export default loading
  