wallet-core/node_modules/fbjs/lib/getDocumentScrollElement.js

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2017-05-03 15:35:00 +02:00
/**
* Copyright (c) 2013-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*
* @typechecks
*/
'use strict';
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;
return !isWebkit && doc.compatMode === 'CSS1Compat' ? doc.documentElement : doc.body;
}
module.exports = getDocumentScrollElement;