Source: widgets/DecoratedOptionWidget.js

/**
 * DecoratedOptionWidgets are {@link OO.ui.OptionWidget options} that can be configured
 * with an {@link OO.ui.mixin.IconElement icon} and/or {@link OO.ui.mixin.IndicatorElement indicator}.
 * This class is used with OO.ui.SelectWidget to create a selection of mutually exclusive
 * options. For more information about options and selects, please see the
 * [OOjs UI documentation on MediaWiki][1].
 *
 *     @example
 *     // Decorated options in a select widget
 *     var select = new OO.ui.SelectWidget( {
 *         items: [
 *             new OO.ui.DecoratedOptionWidget( {
 *                 data: 'a',
 *                 label: 'Option with icon',
 *                 icon: 'help'
 *             } ),
 *             new OO.ui.DecoratedOptionWidget( {
 *                 data: 'b',
 *                 label: 'Option with indicator',
 *                 indicator: 'next'
 *             } )
 *         ]
 *     } );
 *     $( 'body' ).append( select.$element );
 *
 * [1]: https://www.mediawiki.org/wiki/OOjs_UI/Widgets/Selects_and_Options
 *
 * @class
 * @extends OO.ui.OptionWidget
 * @mixes OO.ui.mixin.IconElement
 * @mixes OO.ui.mixin.IndicatorElement
 *
 * @constructor
 * @param {Object} [config] Configuration options
 */
OO.ui.DecoratedOptionWidget = function OoUiDecoratedOptionWidget( config ) {
	// Parent constructor
	OO.ui.DecoratedOptionWidget.parent.call( this, config );

	// Mixin constructors
	OO.ui.mixin.IconElement.call( this, config );
	OO.ui.mixin.IndicatorElement.call( this, config );

	// Initialization
	this.$element
		.addClass( 'oo-ui-decoratedOptionWidget' )
		.prepend( this.$icon )
		.append( this.$indicator );
};

/* Setup */

OO.inheritClass( OO.ui.DecoratedOptionWidget, OO.ui.OptionWidget );
OO.mixinClass( OO.ui.DecoratedOptionWidget, OO.ui.mixin.IconElement );
OO.mixinClass( OO.ui.DecoratedOptionWidget, OO.ui.mixin.IndicatorElement );