简版—await

  1. export const sleep = (timeout = 100) => {
  2.   return new Promise(resolve => {
  3.     setTimeout(resolve, timeout)
  4.   })
  5. }
  7. // 轮询函数
  8. const polling = async (request, times) => {
  9.   if (times <= 0) {
  10.     return false;
  11.   }
  13.   const result = await request();
  14.   if (result) {
  15.     return true;
  16.   }
  18.   await sleep(1000);
  19.   return polling(request, times - 1);
  20. };
  22. // 请求主体函数
  23. const checkOrder = async orderSn => {
  24.   const {
  25.     data: { status },
  26.   } = await Axios.get('/mall/order/status', {
  27.     params: { orderSn },
  28.   })
  29.   return status === 2
  30. }
  32. // 调用
  33. // 当请求主体函数返回true或者times跑完时候会终止
  34. const status = await polling(() => checkOrder(appOrderSn), 3)