request 请求节流

export const getApi = (params = { cache: true }, time = 2000) => {
  // 参数添加cache字段，默认2秒内的请求只发一个
  if (params.cache) {
    const key = JSON.stringify(params)
    let promise = promiseCache.get(key)
    if (!promise) {
      promise = request.post(`${url}`)
      promiseCache.set(key, promise)
    }
    setTimeout(() => {
      promiseCache.delete(key)
    }, time)

    return promise
  }
  return request.post(`${url}`)
}