graphql/jsutils/isPromise.js

A Query Language and Runtime which can target any service.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = isPromise;

/**
 * Copyright (c) 2015-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 *  strict
 */

/**
 * Returns true if the value acts like a Promise, i.e. has a "then" function,
 * otherwise returns false.
 */
// eslint-disable-next-line no-redeclare
function isPromise(value) {
  return Boolean(value && typeof value.then === 'function');
}