46 lines
No EOL
1.1 KiB
JavaScript
Executable file
46 lines
No EOL
1.1 KiB
JavaScript
Executable file
'use strict';
|
|
|
|
/**
|
|
* 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.
|
|
*
|
|
*
|
|
*/
|
|
|
|
var isTextNode = require('./isTextNode');
|
|
|
|
/*eslint-disable no-bitwise */
|
|
|
|
/**
|
|
* Checks if a given DOM node contains or is another DOM node.
|
|
*/
|
|
function containsNode(outerNode, innerNode) {
|
|
if (!outerNode || !innerNode) {
|
|
return false;
|
|
} else if (outerNode === innerNode) {
|
|
return true;
|
|
} else if (isTextNode(outerNode)) {
|
|
return false;
|
|
} else if (isTextNode(innerNode)) {
|
|
return containsNode(outerNode, innerNode.parentNode);
|
|
} else if ('contains' in outerNode) {
|
|
return outerNode.contains(innerNode);
|
|
} else if (outerNode.compareDocumentPosition) {
|
|
return !!(outerNode.compareDocumentPosition(innerNode) & 16);
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
module.exports = containsNode;
|
|
|
|
|
|
//////////////////
|
|
// WEBPACK FOOTER
|
|
// ./~/fbjs/lib/containsNode.js
|
|
// module id = 611
|
|
// module chunks = 4
|