blob: fe5c5106af68f6076c7d70fb8be7a0bc7e75f15c (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
|
'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;
|
