react-native/src/private/setup/setUpDOM.js

A framework for building native apps using React

/**
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @flow strict
 * @format
 */

import DOMRect from '../webapis/dom/geometry/DOMRect';
import DOMRectReadOnly from '../webapis/dom/geometry/DOMRectReadOnly';

let initialized = false;

export default function setUpDOM() {
  if (initialized) {
    return;
  }

  initialized = true;

  // $FlowExpectedError[cannot-write] The global isn't writable anywhere but here, where we define it
  global.DOMRect = DOMRect;

  // $FlowExpectedError[cannot-write] The global isn't writable anywhere but here, where we define it
  global.DOMRectReadOnly = DOMRectReadOnly;
}