You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
36 lines
912 B
36 lines
912 B
'use strict'; |
|
|
|
/** |
|
* 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 |
|
*/ |
|
|
|
/* eslint-disable fb-www/typeof-undefined */ |
|
|
|
/** |
|
* Same as document.activeElement but wraps in a try-catch block. In IE it is |
|
* not safe to call document.activeElement if there is nothing focused. |
|
* |
|
* The activeElement will be null only if the document or document body is not |
|
* yet defined. |
|
* |
|
* @param {?DOMDocument} doc Defaults to current document. |
|
* @return {?DOMElement} |
|
*/ |
|
function getActiveElement(doc) /*?DOMElement*/{ |
|
doc = doc || (typeof document !== 'undefined' ? document : undefined); |
|
if (typeof doc === 'undefined') { |
|
return null; |
|
} |
|
try { |
|
return doc.activeElement || doc.body; |
|
} catch (e) { |
|
return doc.body; |
|
} |
|
} |
|
|
|
module.exports = getActiveElement; |