Interview question for senior front-end engineer

  // Contract:
  //
  // Create a function with a signature:
  //
  //    retry(fn, retryDelay, maxAttempts) -> promise
  //
  // Implementation:
  //
  //  • retry should call fn; if fn() throws an error error, wait for the retry delay to retry calling fn.
  //  • if fn() succeeds, the returned promise should resolve with the result of fn()
  //  • in fn() has been attempted maxAttempts with an error each time, returned promise should reject with the last error
  //
  function retry(fn, retryDelay, maxAttempts) {
    /* ... */
  }