Preamble

DataTables using the header and footer callback manipulation functions (fnHeaderCallback() and fnFooterCallback()) you can perform some powerful and useful data manipulation. The example given below shows how a callback function can be used to total up visible (and hidden) data, taking into account all of DataTable's features (pagination, filtering etc).

Live example

Warning! The market share information given in this table is fabricated using a combination of (mild) judgement, the BBC Browser Statistics information and statistics from TheCounter.com. THe lowest usage given to anyone browser is 0.01 for reasons of this example.

Initialisation code

$(document).ready(function() {
	$('#example').dataTable( {
		"fnFooterCallback": function ( nRow, aaData, iStart, iEnd, aiDisplay ) {
			/*
			 * Calculate the total market share for all browsers in this table (ie inc. outside
			 * the pagination)
			 */
			var iTotalMarket = 0;
			for ( var i=0 ; i<aaData.length ; i++ )
			{
				iTotalMarket += aaData[i][4]*1;
			}
			
			/* Calculate the market share for browsers on this page */
			var iPageMarket = 0;
			for ( var i=iStart ; i<iEnd ; i++ )
			{
				iPageMarket += aaData[ aiDisplay[i] ][4]*1;
			}
			
			/* Modify the footer row to match what we want */
			var nCells = nRow.getElementsByTagName('th');
			nCells[1].innerHTML = parseInt(iPageMarket * 100)/100 +
				'% ('+ parseInt(iTotalMarket * 100)/100 +'% total)';
		}
	} );
} );

Other examples

Basic initialisation

• Zero configuration
• Feature enablement
• Sorting data
• Multi-column sorting
• Multiple tables
• Hidden columns
• DOM positioning
• State saving
• Alternative pagination styles
• Scrolling: Horizontal / Vertical / Both / Themed
• Change language information (internationalisation)
• ThemeRoller themes (Smoothness)

Advanced initialisation

• Events (pre initialisation)
• Events (post initialisation)
• Column rendering
• Sorting without HTML tags
• Multiple table controls (sDom)
• Defining length menu options
• Custom toolbar (element) around table
• Row highlighting with CSS
• Column grouping through col/row spans
• Row grouping
• Row callback
• Footer callback
• Change language information from a file (internationalisation)

Data sources

• DOM
• Javascript array
• Ajax source
• Server side processing

Server-side processing

• Obtain server-side data
• Add extra HTTP variables
• Use HTTP POST
• Custom column ordering (in callback data)
• Pipelining data (reduce Ajax calls for paging)
• Show and hide details about a particular record
• User selectable rows (multiple rows)

API

• Dynamically add a new row
• Individual column filtering (using "input" elements)
• Individual column filtering (using "select" elements)
• Highlight rows and columns
• Show and hide details about a particular record
• User selectable rows (multiple rows)
• User selectable rows (single row) and delete rows
• Editable rows (with jEditable)
• Submit form with elements in table
• Index column (static number column)
• Show and hide columns dynamically
• API function use in initialisation object (callback)
• DataTables scrolling and tabs
• Regular expression filtering

Plug-ins

• Add custom API functions
• Sorting and type detection
• Custom pagination controls
• Range filtering / custom filtering
• Live DOM sorting
• Automatic HTML type detection

Please refer to the DataTables documentation for full information about its API properties and methods.