/**
 * Copyright (c) 2013-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.
 *
 * @typechecks
 */

var getDocumentScrollElement_1;
var hasRequiredGetDocumentScrollElement;

function requireGetDocumentScrollElement () {
	if (hasRequiredGetDocumentScrollElement) return getDocumentScrollElement_1;
	hasRequiredGetDocumentScrollElement = 1;

	var isWebkit = typeof navigator !== 'undefined' && navigator.userAgent.indexOf('AppleWebKit') > -1;
	/**
	 * Gets the element with the document scroll properties such as `scrollLeft` and
	 * `scrollHeight`. This may differ across different browsers.
	 *
	 * NOTE: The return value can be null if the DOM is not yet ready.
	 *
	 * @param {?DOMDocument} doc Defaults to current document.
	 * @return {?DOMElement}
	 */

	function getDocumentScrollElement(doc) {
	  doc = doc || document;

	  if (doc.scrollingElement) {
	    return doc.scrollingElement;
	  }

	  return !isWebkit && doc.compatMode === 'CSS1Compat' ? doc.documentElement : doc.body;
	}

	getDocumentScrollElement_1 = getDocumentScrollElement;
	return getDocumentScrollElement_1;
}

export { requireGetDocumentScrollElement as __require };
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