filterGun - filtering dynamic content easily

filterGun.html

<input type="text" class=".search-input">
<ul class="to-search">
    <li>Apples</li>
    <li>Penguins</li>
    <li>Turtles</li>
</ul>

<script type="text/javascript">
    $(function(){
       $('.search-input').filterGun({
			event: "keyup",
			target: "ul.to-search li",
			searchItemSuccess: function(searchedItem){
				searchedItem.fadeIn(250);
			},
			searchItemFailure: function(searchedItem){
				searchedItem.fadeOut(250);
			},
			searchEnd: function(count){ console.log('Success on '+count) },
		}); 
    });
</script>

filterGun.js

(function($){
	/*
		$('.search-input').filterGun({
			event: "keyup",
			target: "ul.to-search li",
			targetExtraValidation: function(searchedItem){
				if( searchedItem.attr('disabled') ){ return false; }
				else { return true; } 
			},
			searchItemSuccess: function(searchedItem){
				searchedItem.fadeIn(250);
			},
			searchItemFailure: function(searchedItem){
				searchedItem.fadeOut(250);
			},
			searchEnd: function(count){ console.log('Success on '+count) },
		});
	*/
	$.fn.filterGun = function(options){

		var _this = this,
			searchObject = $(this),
			searchEvent = options.event || "keyup",
			searchTarget = options.target || "ul:first-of-type li",

			searchItemExtraValidation = options.targetExtraValidation || function(){ return true; },
			searchItemFailure = options.searchItemFailure || function(obj){},
			searchItemSuccess = options.searchItemSuccess || function(obj){},
			searchEnd = options.searchEnd || function(count) {};

		// When the search input object emits the specified event, it
		// loops through the target items to find out which ones will filter.
		searchObject.on(searchEvent, function(){
			_this.filter();
		});	

		this.filter = function(){
			var searchQuery = searchObject.val(),
				count 		= 0;

			// If the actual target in the loop filters, call a success function
			// otherwise, calls an error function
			$(searchTarget).each(function(){
				if(
					$(this).val() && $(this).val().search(new RegExp(searchQuery, "i")) < 0 ||
					$(this).text() && $(this).text().search(new RegExp(searchQuery, "i")) < 0
				){ searchItemFailure($(this)); }
				else {

					// Check if it needs aditional validation before setting as filtered
					if( searchItemExtraValidation( $(this) ) ){
						count++;
						searchItemSuccess($(this));
					} else { 
						searchItemFailure($(this)); }
				}
			});
			// calls and end filtering function
			searchEnd(count);
		}

		return this;
	}
})(jQuery);