promise-retry.js

let retry = function(fn, maxTime) {
  let counter = 0;
  function execFunc () {
    return new Promise((resolve, reject) => {
      console.log(`第${counter}次请求`);
      resolve(fn);
    }).then(res => {
      return Promise.resolve(res);
    }).catch(e=>{
      counter += 1;
      if(counter >= maxTime) {
        return Promise.reject(e)
      } else {
        return execFunc()
      }
    })
  }
  return execFunc()
}