ckeditor5-image-upload-base64
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The development environment of CKEditor 5 – the best browser-based rich text editor.
32 lines (25 loc) • 896 B
JavaScript
/**
* @license Copyright (c) 2003-2020, CKSource - Frederico Knabben. All rights reserved.
* For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license
*/
/**
* @module utils/dom/getcommonancestor
*/
import getAncestors from './getancestors';
/**
* Searches and returns the lowest common ancestor of two given nodes.
*
* @param {Node} nodeA First node.
* @param {Node} nodeB Second node.
* @returns {Node|DocumentFragment|Document|null} Lowest common ancestor of both nodes or `null` if nodes do not have a common ancestor.
*/
export default function getCommonAncestor( nodeA, nodeB ) {
const ancestorsA = getAncestors( nodeA );
const ancestorsB = getAncestors( nodeB );
let i = 0;
// It does not matter which array is shorter.
while ( ancestorsA[ i ] == ancestorsB[ i ] && ancestorsA[ i ] ) {
i++;
}
return i === 0 ? null : ancestorsA[ i - 1 ];
}