isPromise.js 491 B

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  1. 'use strict';
  2. Object.defineProperty(exports, '__esModule', {
  3. value: true
  4. });
  5. exports.default = isPromise;
  6. /**
  7. * Copyright (c) Meta Platforms, Inc. and affiliates.
  8. *
  9. * This source code is licensed under the MIT license found in the
  10. * LICENSE file in the root directory of this source tree.
  11. */
  12. function isPromise(candidate) {
  13. return (
  14. candidate != null &&
  15. (typeof candidate === 'object' || typeof candidate === 'function') &&
  16. typeof candidate.then === 'function'
  17. );
  18. }