1
function retry(promiseFn, times = 2) {
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  let count = 0;
3

4
  function handleRetry(res, rej) {
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    return new Promise((resolve = res, reject = rej) => {
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      promiseFn()
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        .then((data) => {
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          resolve(data);
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        })
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        .catch((err) => {
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          if (count === times || !times) {
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            reject(err);
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          } else {
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            count++;
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            handleRetry(resolve, reject);
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          }
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        });
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    });
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  }
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21
  return handleRetry();
22
}
23

24
let mark = 0;
25

26
function test() {
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  return new Promise((resolve, reject) => {
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    setTimeout(() => {
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      mark++;
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      if (mark === 10) {
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        resolve("成功resolve");
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        console.log("成功了");
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      } else {
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        reject("error");
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        console.log("失败了");
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      }
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    }, 500);
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  });
39
}
40

41
retry(test, 5)
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  .then((data) => {
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    console.log(data);
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  })
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  .catch((err) => {
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    console.log(err);
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  });