graphql/jsutils/isInteger.js.flow

A Query Language and Runtime which can target any service.

/**
 * Copyright (c) 2018-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.
 *
 * @flow strict
 */

declare function isInteger(value: mixed): boolean %checks(typeof value ===
  'number');

/* eslint-disable no-redeclare */
// $FlowFixMe workaround for: https://github.com/facebook/flow/issues/4441
const isInteger =
  Number.isInteger ||
  function(value) {
    return (
      typeof value === 'number' &&
      isFinite(value) &&
      Math.floor(value) === value
    );
  };
export default isInteger;