Global: removed c.$extraTables & c.$extraHeaders

These variables were causing memory leaks

dist/js/jquery.tablesorter.js

@@ -559,7 +559,9 @@
 					cssIcon = [ c.cssIconAsc, c.cssIconDesc, c.cssIconNone ],
 					aria = ['ascending', 'descending'],
 					// find the footer
-					$t = $(table).find('tfoot tr').children().add(c.$extraHeaders).removeClass(css.join(' '));
+					$t = $(table).find('tfoot tr').children()
+						.add( $( c.namespace + '_extra_headers' ) )
+						.removeClass( css.join( ' ' ) );
 				// remove all header information
 				c.$headers
 					.removeClass(css.join(' '))
@@ -1337,10 +1339,10 @@
 				var t, downTarget = null,
 					c = table.config;
 				if (core !== true) {
-					c.$extraHeaders = c.$extraHeaders ? c.$extraHeaders.add($headers) : $headers;
+					$headers.addClass( c.namespace.slice(1) + '_extra_headers' );
 					t = $.fn.closest ? $headers.closest('table')[0] : $headers.parents('table')[0];
 					if (t && t.nodeName === 'TABLE' && t !== table) {
-						c.$extraTables = c.$extraTables ? c.$extraTables.add(t) : $(t);
+						$(t).addClass( c.namespace.slice(1) + '_extra_table' );
 					}
 				}
 				// apply event handling to headers and/or additional headers (stickyheaders, scroller, etc)
@@ -2057,7 +2059,7 @@
 		format: function(table, c, wo) {
 			var $tb, $tv, $tr, row, even, time, k,
 				child = new RegExp(c.cssChildRow, 'i'),
-				b = c.$tbodies.add( c.$extraTables && c.$extraTables.children( 'tbody' ) );
+				b = c.$tbodies.add( $( c.namespace + '_extra_table' ).children( 'tbody' ) );
 			if (c.debug) {
 				time = new Date();
 			}

dist/js/jquery.tablesorter.widgets.js

@@ -1,4 +1,4 @@
-/*! tablesorter (FORK) widgets - updated 03-24-2015 (v2.21.2)*/
+/*! tablesorter (FORK) widgets - updated 03-25-2015 (v2.21.2)*/
 /* Includes: storage,uitheme,columns,filter,stickyHeaders,resizable,saveSort */
 (function(factory) {
   if (typeof define === 'function' && define.amd) {
@@ -147,8 +147,8 @@ ts.addWidget({
 	format: function(table, c, wo) {
 		var i, hdr, icon, time, $header, $icon, $tfoot, $h, oldtheme, oldremove, oldIconRmv, hasOldTheme,
 			themesAll = ts.themes,
-			$table = c.$table.add( c.$extraTables ),
+			$table = c.$table.add( $( c.namespace + '_extra_table' ) ),
-			$headers = c.$headers.add( c.$extraHeaders ),
+			$headers = c.$headers.add( $( c.namespace + '_extra_headers' ) ),
 			theme = c.theme || 'jui',
 			themes = themesAll[theme] || {},
 			remove = $.trim( [ themes.sortNone, themes.sortDesc, themes.sortAsc, themes.active ].join( ' ' ) ),
@@ -219,7 +219,10 @@ ts.addWidget({
 			}
 		}
 		for (i = 0; i < c.columns; i++) {
-			$header = c.$headers.add(c.$extraHeaders).not('.sorter-false').filter('[data-column="' + i + '"]');
+			$header = c.$headers
+				.add($(c.namespace + '_extra_headers'))
+				.not('.sorter-false')
+				.filter('[data-column="' + i + '"]');
 			$icon = (ts.css.icon) ? $header.find('.' + ts.css.icon) : $();
 			$h = $headers.not('.sorter-false').filter('[data-column="' + i + '"]:last');
 			if ($h.length) {
@@ -1769,7 +1772,7 @@ ts.addWidget({
 			nestedStickyTop = $nestedSticky.length ? $nestedSticky.height() : 0,
 			// clone table, then wrap to make sticky header
 			$stickyTable = wo.$sticky = $table.clone()
-				.addClass('containsStickyHeaders ' + ts.css.sticky + ' ' + wo.stickyHeaders)
+				.addClass('containsStickyHeaders ' + ts.css.sticky + ' ' + wo.stickyHeaders + ' ' + c.namespace.slice(1) + '_extra_table' )
 				.wrap('<div class="' + ts.css.stickyWrap + '">'),
 			$stickyWrap = $stickyTable.parent()
 				.addClass(ts.css.stickyHide)
@@ -1827,13 +1830,6 @@ ts.addWidget({
 		if ($attach.length && !$attach.css('position')) {
 			$attach.css('position', 'relative');
 		}
-		// save stickyTable element to config
-		// it is also saved to wo.$sticky
-		if (c.$extraTables && c.$extraTables.length) {
-			c.$extraTables.add($stickyTable);
-		} else {
-			c.$extraTables = $stickyTable;
-		}
 		// fix clone ID, if it exists - fixes #271
 		if ($stickyTable.attr('id')) { $stickyTable[0].id += wo.stickyHeaders_cloneId; }
 		// clear out cloned table, except for sticky header

dist/js/widgets/widget-uitheme.min.js

@@ -1,2 +1,2 @@
 /*! Widget: uitheme */
-!function(a){"use strict";var b=a.tablesorter=a.tablesorter||{};b.themes={bootstrap:{table:"table table-bordered table-striped",caption:"caption",header:"bootstrap-header",sortNone:"",sortAsc:"",sortDesc:"",active:"",hover:"",icons:"",iconSortNone:"bootstrap-icon-unsorted",iconSortAsc:"icon-chevron-up glyphicon glyphicon-chevron-up",iconSortDesc:"icon-chevron-down glyphicon glyphicon-chevron-down",filterRow:"",footerRow:"",footerCells:"",even:"",odd:""},jui:{table:"ui-widget ui-widget-content ui-corner-all",caption:"ui-widget-content",header:"ui-widget-header ui-corner-all ui-state-default",sortNone:"",sortAsc:"",sortDesc:"",active:"ui-state-active",hover:"ui-state-hover",icons:"ui-icon",iconSortNone:"ui-icon-carat-2-n-s",iconSortAsc:"ui-icon-carat-1-n",iconSortDesc:"ui-icon-carat-1-s",filterRow:"",footerRow:"",footerCells:"",even:"ui-widget-content",odd:"ui-state-default"}},a.extend(b.css,{wrapper:"tablesorter-wrapper"}),b.addWidget({id:"uitheme",priority:10,format:function(c,d,e){var f,g,h,i,j,k,l,m,n,o,p,q,r=b.themes,s=d.$table.add(d.$extraTables),t=d.$headers.add(d.$extraHeaders),u=d.theme||"jui",v=r[u]||{},w=a.trim([v.sortNone,v.sortDesc,v.sortAsc,v.active].join(" ")),x=a.trim([v.iconSortNone,v.iconSortDesc,v.iconSortAsc].join(" "));for(d.debug&&(i=new Date),s.hasClass("tablesorter-"+u)&&d.theme===d.appliedTheme&&e.uitheme_applied||(e.uitheme_applied=!0,n=r[d.appliedTheme]||{},q=!a.isEmptyObject(n),o=q?[n.sortNone,n.sortDesc,n.sortAsc,n.active].join(" "):"",p=q?[n.iconSortNone,n.iconSortDesc,n.iconSortAsc].join(" "):"",q&&(e.zebra[0]=a.trim(" "+e.zebra[0].replace(" "+n.even,"")),e.zebra[1]=a.trim(" "+e.zebra[1].replace(" "+n.odd,"")),d.$tbodies.children().removeClass([n.even,n.odd].join(" "))),v.even&&(e.zebra[0]+=" "+v.even),v.odd&&(e.zebra[1]+=" "+v.odd),s.children("caption").removeClass(n.caption||"").addClass(v.caption),l=s.removeClass((d.appliedTheme?"tablesorter-"+(d.appliedTheme||""):"")+" "+(n.table||"")).addClass("tablesorter-"+u+" "+(v.table||"")).children("tfoot"),d.appliedTheme=d.theme,l.length&&l.children("tr").removeClass(n.footerRow||"").addClass(v.footerRow).children("th, td").removeClass(n.footerCells||"").addClass(v.footerCells),t.removeClass((q?[n.header,n.hover,o].join(" "):"")||"").addClass(v.header).not(".sorter-false").unbind("mouseenter.tsuitheme mouseleave.tsuitheme").bind("mouseenter.tsuitheme mouseleave.tsuitheme",function(b){a(this)["mouseenter"===b.type?"addClass":"removeClass"](v.hover||"")}),t.each(function(){var c=a(this);c.find("."+b.css.wrapper).length||c.wrapInner('<div class="'+b.css.wrapper+'" style="position:relative;height:100%;width:100%"></div>')}),d.cssIcon&&t.find("."+b.css.icon).removeClass(q?[n.icons,p].join(" "):"").addClass(v.icons||""),s.hasClass("hasFilters")&&s.children("thead").children("."+b.css.filterRow).removeClass(q?n.filterRow||"":"").addClass(v.filterRow||"")),f=0;f<d.columns;f++)j=d.$headers.add(d.$extraHeaders).not(".sorter-false").filter('[data-column="'+f+'"]'),k=b.css.icon?j.find("."+b.css.icon):a(),m=t.not(".sorter-false").filter('[data-column="'+f+'"]:last'),m.length&&(j.removeClass(w),k.removeClass(x),m[0].sortDisabled?k.removeClass(v.icons||""):(g=v.sortNone,h=v.iconSortNone,m.hasClass(b.css.sortAsc)?(g=[v.sortAsc,v.active].join(" "),h=v.iconSortAsc):m.hasClass(b.css.sortDesc)&&(g=[v.sortDesc,v.active].join(" "),h=v.iconSortDesc),j.addClass(g),k.addClass(h||"")));d.debug&&b.benchmark("Applying "+u+" theme",i)},remove:function(a,c,d,e){if(d.uitheme_applied){var f=c.$table,g=c.appliedTheme||"jui",h=b.themes[g]||b.themes.jui,i=f.children("thead").children(),j=h.sortNone+" "+h.sortDesc+" "+h.sortAsc,k=h.iconSortNone+" "+h.iconSortDesc+" "+h.iconSortAsc;f.removeClass("tablesorter-"+g+" "+h.table),d.uitheme_applied=!1,e||(f.find(b.css.header).removeClass(h.header),i.unbind("mouseenter.tsuitheme mouseleave.tsuitheme").removeClass(h.hover+" "+j+" "+h.active).filter("."+b.css.filterRow).removeClass(h.filterRow),i.find("."+b.css.icon).removeClass(h.icons+" "+k))}}})}(jQuery);
+!function(a){"use strict";var b=a.tablesorter=a.tablesorter||{};b.themes={bootstrap:{table:"table table-bordered table-striped",caption:"caption",header:"bootstrap-header",sortNone:"",sortAsc:"",sortDesc:"",active:"",hover:"",icons:"",iconSortNone:"bootstrap-icon-unsorted",iconSortAsc:"icon-chevron-up glyphicon glyphicon-chevron-up",iconSortDesc:"icon-chevron-down glyphicon glyphicon-chevron-down",filterRow:"",footerRow:"",footerCells:"",even:"",odd:""},jui:{table:"ui-widget ui-widget-content ui-corner-all",caption:"ui-widget-content",header:"ui-widget-header ui-corner-all ui-state-default",sortNone:"",sortAsc:"",sortDesc:"",active:"ui-state-active",hover:"ui-state-hover",icons:"ui-icon",iconSortNone:"ui-icon-carat-2-n-s",iconSortAsc:"ui-icon-carat-1-n",iconSortDesc:"ui-icon-carat-1-s",filterRow:"",footerRow:"",footerCells:"",even:"ui-widget-content",odd:"ui-state-default"}},a.extend(b.css,{wrapper:"tablesorter-wrapper"}),b.addWidget({id:"uitheme",priority:10,format:function(c,d,e){var f,g,h,i,j,k,l,m,n,o,p,q,r=b.themes,s=d.$table.add(a(d.namespace+"_extra_table")),t=d.$headers.add(a(d.namespace+"_extra_headers")),u=d.theme||"jui",v=r[u]||{},w=a.trim([v.sortNone,v.sortDesc,v.sortAsc,v.active].join(" ")),x=a.trim([v.iconSortNone,v.iconSortDesc,v.iconSortAsc].join(" "));for(d.debug&&(i=new Date),s.hasClass("tablesorter-"+u)&&d.theme===d.appliedTheme&&e.uitheme_applied||(e.uitheme_applied=!0,n=r[d.appliedTheme]||{},q=!a.isEmptyObject(n),o=q?[n.sortNone,n.sortDesc,n.sortAsc,n.active].join(" "):"",p=q?[n.iconSortNone,n.iconSortDesc,n.iconSortAsc].join(" "):"",q&&(e.zebra[0]=a.trim(" "+e.zebra[0].replace(" "+n.even,"")),e.zebra[1]=a.trim(" "+e.zebra[1].replace(" "+n.odd,"")),d.$tbodies.children().removeClass([n.even,n.odd].join(" "))),v.even&&(e.zebra[0]+=" "+v.even),v.odd&&(e.zebra[1]+=" "+v.odd),s.children("caption").removeClass(n.caption||"").addClass(v.caption),l=s.removeClass((d.appliedTheme?"tablesorter-"+(d.appliedTheme||""):"")+" "+(n.table||"")).addClass("tablesorter-"+u+" "+(v.table||"")).children("tfoot"),d.appliedTheme=d.theme,l.length&&l.children("tr").removeClass(n.footerRow||"").addClass(v.footerRow).children("th, td").removeClass(n.footerCells||"").addClass(v.footerCells),t.removeClass((q?[n.header,n.hover,o].join(" "):"")||"").addClass(v.header).not(".sorter-false").unbind("mouseenter.tsuitheme mouseleave.tsuitheme").bind("mouseenter.tsuitheme mouseleave.tsuitheme",function(b){a(this)["mouseenter"===b.type?"addClass":"removeClass"](v.hover||"")}),t.each(function(){var c=a(this);c.find("."+b.css.wrapper).length||c.wrapInner('<div class="'+b.css.wrapper+'" style="position:relative;height:100%;width:100%"></div>')}),d.cssIcon&&t.find("."+b.css.icon).removeClass(q?[n.icons,p].join(" "):"").addClass(v.icons||""),s.hasClass("hasFilters")&&s.children("thead").children("."+b.css.filterRow).removeClass(q?n.filterRow||"":"").addClass(v.filterRow||"")),f=0;f<d.columns;f++)j=d.$headers.add(a(d.namespace+"_extra_headers")).not(".sorter-false").filter('[data-column="'+f+'"]'),k=b.css.icon?j.find("."+b.css.icon):a(),m=t.not(".sorter-false").filter('[data-column="'+f+'"]:last'),m.length&&(j.removeClass(w),k.removeClass(x),m[0].sortDisabled?k.removeClass(v.icons||""):(g=v.sortNone,h=v.iconSortNone,m.hasClass(b.css.sortAsc)?(g=[v.sortAsc,v.active].join(" "),h=v.iconSortAsc):m.hasClass(b.css.sortDesc)&&(g=[v.sortDesc,v.active].join(" "),h=v.iconSortDesc),j.addClass(g),k.addClass(h||"")));d.debug&&b.benchmark("Applying "+u+" theme",i)},remove:function(a,c,d,e){if(d.uitheme_applied){var f=c.$table,g=c.appliedTheme||"jui",h=b.themes[g]||b.themes.jui,i=f.children("thead").children(),j=h.sortNone+" "+h.sortDesc+" "+h.sortAsc,k=h.iconSortNone+" "+h.iconSortDesc+" "+h.iconSortAsc;f.removeClass("tablesorter-"+g+" "+h.table),d.uitheme_applied=!1,e||(f.find(b.css.header).removeClass(h.header),i.unbind("mouseenter.tsuitheme mouseleave.tsuitheme").removeClass(h.hover+" "+j+" "+h.active).filter("."+b.css.filterRow).removeClass(h.filterRow),i.find("."+b.css.icon).removeClass(h.icons+" "+k))}}})}(jQuery);

docs/index.html

@@ -5500,34 +5500,6 @@ $('.tablesorter')[0].config.cache[0].normalized[0];
 				</td>
 			</tr>
 
-			<tr id="variable-extra-headers">
-				<td><a href="#" class="permalink">config.$extraHeaders</a></td>
-				<td>jQuery Object</td>
-				<td>Internal list of <strong>all</strong> extra table header cells (<span class="version">v2.16.2</span>)
-					<div class="collapsible">
-						<br>
-						When the <a href="#function-bindevents"><code>bindEvents</code></a> function is used, the extra (external) header cells are added to this variable, and automatically updated with the table headers (<a href="#variable-headers"><code>config.$headers</code></a>).<br>
-						<br>
-						So, when writing a custom widget that clones the table header, there is no longer a need to update the header class names, it's all done automatically.
-					</div>
-					</td>
-				<td></td>
-			</tr>
-
-			<tr id="variable-extra-tables">
-				<td><a href="#" class="permalink">config.$extraTables</a></td>
-				<td>jQuery Object</td>
-				<td>Internal list of <strong>all</strong> extra (cloned) table elements (<span class="version">v2.19.0</span>)
-					<div class="collapsible">
-						<br>
-						Some widgets need to duplicate parts of the original table to provide functionality (e.g. stickyHeaders, scroller). This saved variable will either not exist or contain a jQuery object pointing to the cloned table elements.<br>
-						<br>
-						This variable was added for the uitheme widget to allow dynamic updating of themes to the original table as well as all cloned parts.
-					</div>
-					</td>
-				<td></td>
-			</tr>
-
 			<tr id="variable-header-indexed">
 				<td><a href="#" class="permalink">config.$headerIndexed</a></td>
 				<td>Array</td>
@@ -5983,6 +5955,43 @@ $.each( p.cacheIndex, function(i, v) {
 
 		</tbody>
 
+		<!-- non-sorting tbody -->
+		<tbody id="pager-removed" class="tablesorter-infoOnly">
+			<tr><th colspan="5">Removed Variables</th></tr>
+		</tbody>
+
+		<tbody>
+
+			<tr id="variable-extra-headers">
+				<td><a href="#" class="permalink alert">config.$extraHeaders</a></td>
+				<td>jQuery Object</td>
+				<td>Internal list of <strong>all</strong> extra table header cells (<span class="version">v2.16.2</span>; <span class="label label-danger">removed</span> v2.21.3)
+					<div class="collapsible">
+						<p>This variable was removed due to it causing memory leak issues. To now find extra headers use <a href="#namespace"><code>config.namespace</code></a> as follows:</p>
+						<pre class="prettyprint lang-js">$( config.namespace + '_extra_headers' )</pre>
+						<p>When the <a href="#function-bindevents"><code>bindEvents</code></a> function is used, the extra (external) header cells are added to this variable, and automatically updated with the table headers (<a href="#variable-headers"><code>config.$headers</code></a>).</p>
+						<p>So, when writing a custom widget that clones the table header, there is no longer a need to update the header class names, it's all done automatically.</p>
+					</div>
+					</td>
+				<td></td>
+			</tr>
+
+			<tr id="variable-extra-tables">
+				<td><a href="#" class="permalink alert">config.$extraTables</a></td>
+				<td>jQuery Object</td>
+				<td>Internal list of <strong>all</strong> extra (cloned) table elements (<span class="version">v2.19.0</span>; <span class="label label-danger">removed</span> v2.21.3)
+					<div class="collapsible">
+						<p>This variable was removed due to it causing memory leak issues. To find extra tables use <a href="#namespace"><code>config.namespace</code></a> as follows:</p>
+						<pre class="prettyprint lang-js">$( config.namespace + '_extra_table' )</pre>
+						<p>Some widgets need to duplicate parts of the original table to provide functionality (e.g. stickyHeaders, scroller). This saved variable will either not exist or contain a jQuery object pointing to the cloned table elements.</p>
+						<p>This variable was added for the uitheme widget to allow dynamic updating of themes to the original table as well as all cloned parts.</p>
+					</div>
+					</td>
+				<td></td>
+			</tr>
+
+		</tbody>
+
 	</table>
 
 	<div class="tip">

js/jquery.tablesorter.js

@@ -559,7 +559,9 @@
 					cssIcon = [ c.cssIconAsc, c.cssIconDesc, c.cssIconNone ],
 					aria = ['ascending', 'descending'],
 					// find the footer
-					$t = $(table).find('tfoot tr').children().add(c.$extraHeaders).removeClass(css.join(' '));
+					$t = $(table).find('tfoot tr').children()
+						.add( $( c.namespace + '_extra_headers' ) )
+						.removeClass( css.join( ' ' ) );
 				// remove all header information
 				c.$headers
 					.removeClass(css.join(' '))
@@ -1337,10 +1339,10 @@
 				var t, downTarget = null,
 					c = table.config;
 				if (core !== true) {
-					c.$extraHeaders = c.$extraHeaders ? c.$extraHeaders.add($headers) : $headers;
+					$headers.addClass( c.namespace.slice(1) + '_extra_headers' );
 					t = $.fn.closest ? $headers.closest('table')[0] : $headers.parents('table')[0];
 					if (t && t.nodeName === 'TABLE' && t !== table) {
-						c.$extraTables = c.$extraTables ? c.$extraTables.add(t) : $(t);
+						$(t).addClass( c.namespace.slice(1) + '_extra_table' );
 					}
 				}
 				// apply event handling to headers and/or additional headers (stickyheaders, scroller, etc)
@@ -2057,7 +2059,7 @@
 		format: function(table, c, wo) {
 			var $tb, $tv, $tr, row, even, time, k,
 				child = new RegExp(c.cssChildRow, 'i'),
-				b = c.$tbodies.add( c.$extraTables && c.$extraTables.children( 'tbody' ) );
+				b = c.$tbodies.add( $( c.namespace + '_extra_table' ).children( 'tbody' ) );
 			if (c.debug) {
 				time = new Date();
 			}

js/jquery.tablesorter.widgets.js

@@ -4,7 +4,7 @@
 ██  ██ ██  ██   ██  ██ ██  ██   ██     ██ ██ ██ ██  ██ ██  ██ ██ ██▀▀   ▀▀▀▀██
 █████▀ ▀████▀   ██  ██ ▀████▀   ██     ██ ██ ██ ▀████▀ █████▀ ██ ██     █████▀
 */
-/*! tablesorter (FORK) widgets - updated 03-24-2015 (v2.21.2)*/
+/*! tablesorter (FORK) widgets - updated 03-25-2015 (v2.21.2)*/
 /* Includes: storage,uitheme,columns,filter,stickyHeaders,resizable,saveSort */
 (function(factory) {
   if (typeof define === 'function' && define.amd) {
@@ -153,8 +153,8 @@ ts.addWidget({
 	format: function(table, c, wo) {
 		var i, hdr, icon, time, $header, $icon, $tfoot, $h, oldtheme, oldremove, oldIconRmv, hasOldTheme,
 			themesAll = ts.themes,
-			$table = c.$table.add( c.$extraTables ),
+			$table = c.$table.add( $( c.namespace + '_extra_table' ) ),
-			$headers = c.$headers.add( c.$extraHeaders ),
+			$headers = c.$headers.add( $( c.namespace + '_extra_headers' ) ),
 			theme = c.theme || 'jui',
 			themes = themesAll[theme] || {},
 			remove = $.trim( [ themes.sortNone, themes.sortDesc, themes.sortAsc, themes.active ].join( ' ' ) ),
@@ -225,7 +225,10 @@ ts.addWidget({
 			}
 		}
 		for (i = 0; i < c.columns; i++) {
-			$header = c.$headers.add(c.$extraHeaders).not('.sorter-false').filter('[data-column="' + i + '"]');
+			$header = c.$headers
+				.add($(c.namespace + '_extra_headers'))
+				.not('.sorter-false')
+				.filter('[data-column="' + i + '"]');
 			$icon = (ts.css.icon) ? $header.find('.' + ts.css.icon) : $();
 			$h = $headers.not('.sorter-false').filter('[data-column="' + i + '"]:last');
 			if ($h.length) {
@@ -1775,7 +1778,7 @@ ts.addWidget({
 			nestedStickyTop = $nestedSticky.length ? $nestedSticky.height() : 0,
 			// clone table, then wrap to make sticky header
 			$stickyTable = wo.$sticky = $table.clone()
-				.addClass('containsStickyHeaders ' + ts.css.sticky + ' ' + wo.stickyHeaders)
+				.addClass('containsStickyHeaders ' + ts.css.sticky + ' ' + wo.stickyHeaders + ' ' + c.namespace.slice(1) + '_extra_table' )
 				.wrap('<div class="' + ts.css.stickyWrap + '">'),
 			$stickyWrap = $stickyTable.parent()
 				.addClass(ts.css.stickyHide)
@@ -1833,13 +1836,6 @@ ts.addWidget({
 		if ($attach.length && !$attach.css('position')) {
 			$attach.css('position', 'relative');
 		}
-		// save stickyTable element to config
-		// it is also saved to wo.$sticky
-		if (c.$extraTables && c.$extraTables.length) {
-			c.$extraTables.add($stickyTable);
-		} else {
-			c.$extraTables = $stickyTable;
-		}
 		// fix clone ID, if it exists - fixes #271
 		if ($stickyTable.attr('id')) { $stickyTable[0].id += wo.stickyHeaders_cloneId; }
 		// clear out cloned table, except for sticky header

js/widgets/widget-stickyHeaders.js

@@ -95,7 +95,7 @@ ts.addWidget({
 			nestedStickyTop = $nestedSticky.length ? $nestedSticky.height() : 0,
 			// clone table, then wrap to make sticky header
 			$stickyTable = wo.$sticky = $table.clone()
-				.addClass('containsStickyHeaders ' + ts.css.sticky + ' ' + wo.stickyHeaders)
+				.addClass('containsStickyHeaders ' + ts.css.sticky + ' ' + wo.stickyHeaders + ' ' + c.namespace.slice(1) + '_extra_table' )
 				.wrap('<div class="' + ts.css.stickyWrap + '">'),
 			$stickyWrap = $stickyTable.parent()
 				.addClass(ts.css.stickyHide)
@@ -153,13 +153,6 @@ ts.addWidget({
 		if ($attach.length && !$attach.css('position')) {
 			$attach.css('position', 'relative');
 		}
-		// save stickyTable element to config
-		// it is also saved to wo.$sticky
-		if (c.$extraTables && c.$extraTables.length) {
-			c.$extraTables.add($stickyTable);
-		} else {
-			c.$extraTables = $stickyTable;
-		}
 		// fix clone ID, if it exists - fixes #271
 		if ($stickyTable.attr('id')) { $stickyTable[0].id += wo.stickyHeaders_cloneId; }
 		// clear out cloned table, except for sticky header

js/widgets/widget-uitheme.js

@@ -58,8 +58,8 @@ ts.addWidget({
 	format: function(table, c, wo) {
 		var i, hdr, icon, time, $header, $icon, $tfoot, $h, oldtheme, oldremove, oldIconRmv, hasOldTheme,
 			themesAll = ts.themes,
-			$table = c.$table.add( c.$extraTables ),
+			$table = c.$table.add( $( c.namespace + '_extra_table' ) ),
-			$headers = c.$headers.add( c.$extraHeaders ),
+			$headers = c.$headers.add( $( c.namespace + '_extra_headers' ) ),
 			theme = c.theme || 'jui',
 			themes = themesAll[theme] || {},
 			remove = $.trim( [ themes.sortNone, themes.sortDesc, themes.sortAsc, themes.active ].join( ' ' ) ),
@@ -130,7 +130,10 @@ ts.addWidget({
 			}
 		}
 		for (i = 0; i < c.columns; i++) {
-			$header = c.$headers.add(c.$extraHeaders).not('.sorter-false').filter('[data-column="' + i + '"]');
+			$header = c.$headers
+				.add($(c.namespace + '_extra_headers'))
+				.not('.sorter-false')
+				.filter('[data-column="' + i + '"]');
 			$icon = (ts.css.icon) ? $header.find('.' + ts.css.icon) : $();
 			$h = $headers.not('.sorter-false').filter('[data-column="' + i + '"]:last');
 			if ($h.length) {