graphql/jsutils/invariant.js.flow

A Query Language and Runtime which can target any service.

/**
 * 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.
 *
 * @flow strict
 */

export default function invariant(condition: mixed, message: string) {
  /* istanbul ignore else */
  if (!condition) {
    throw new Error(message);
  }
}