--- /dev/null
+define([
+'libs/jquery',
+], function($) {
+
+'use strict';
+
+
+var nearestInDocumentOrder = function(selector, direction, element) {
+ var parents = $(element).parents(),
+ parent = parents.length ? $(parents[parents.length-1]) : element;
+
+ var adj = parent.find(selector).filter(function() {
+ return this.compareDocumentPosition(element) & (direction === 'above' ? Node.DOCUMENT_POSITION_FOLLOWING : Node.DOCUMENT_POSITION_PRECEDING);
+ });
+
+ if(adj.length) {
+ return adj[direction === 'above' ? adj.length-1 : 0];
+ }
+ return null;
+}
+
+return {
+ nearestInDocumentOrder: nearestInDocumentOrder,
+ unicode: {
+ ZWS: '\u200B'
+ }
+};
+
+});