//>>excludeStart("exclude", pragmas.exclude);
define([ "shoestring", "dom/is" ], function( shoestring ) {
//>>excludeEnd("exclude");

	/**
	 * Find an element matching the selector in the set of the current element and its parents.
	 *
	 * @param {string} selector The selector used to identify the target element.
	 * @return shoestring
	 * @this shoestring
	 */
	shoestring.fn.closest = function( selector ){
		var ret = [];

		if( !selector ){
			return shoestring( ret );
		}

		this.each(function(){
			var element, $self = shoestring( element = this );

			if( $self.is(selector) ){
				ret.push( this );
				return;
			}

			while( element.parentElement ) {
				if( shoestring(element.parentElement).is(selector) ){
					ret.push( element.parentElement );
					break;
				}

				element = element.parentElement;
			}
		});

		return shoestring( ret );
	};

//>>excludeStart("exclude", pragmas.exclude);
});
//>>excludeEnd("exclude");