Plugins/sorting/alt-string.js

/*! © SpryMedia Ltd, Jumpy - datatables.net/license */

(function( factory ){
	if ( typeof define === 'function' && define.amd ) {
		// AMD
		define( ['datatables.net'], function ( $ ) {
			return factory( $, window, document );
		} );
	}
	else if ( typeof exports === 'object' ) {
		// CommonJS
		module.exports = function (root, $) {
			if ( ! root ) {
				// CommonJS environments without a window global must pass a
				// root. This will give an error otherwise
				root = window;
			}

			if ( ! $.fn.dataTable ) {
				require('datatables.net')(root, $);
			}

			return factory( $, root, root.document );
		};
	}
	else {
		// Browser
		factory( jQuery, window, document );
	}
}(function( $, window, document, undefined ) {
'use strict';
var DataTable = $.fn.dataTable;


/**
 * Sort on the 'alt' tag of images in a column. This is particularly useful if
 * you have a column of images (ticks and crosses for example) and you want to
 * control the sorting using the alt tag.
 *
 *  @name Alt string
 *  @summary Use the `alt` attribute of an image tag as the data to sort upon.
 *  @author _Jumpy_
 *
 *  @example
 *    $('#example').dataTable( {
 *       columnDefs: [
 *         { type: 'alt-string', targets: 0 }
 *       ]
 *    } );
 */
DataTable.ext.order['alt-string-pre'] = function (a) {
    return a.match(/alt="(.*?)"/)[1].toLowerCase();
};


return DataTable;
}));