Q:

jQuery change hover to click

I altered the following code and replaced .hover with .click.   Everything is working fine except the lack of an "offclick" function.   With .hover it was no issue.   How do I add to this to account for clicking off the element.   ul visibility should be 'hidden' when clicking off, outside, etc. 
$(document).ready(function(){

if($("ul.dropdown").length) {
    $("ul.dropdown li").dropdown();
}

});

$.fn.dropdown = function() {

return this.each(function() {

    $(this).click(function(){
        $(this).addClass("click");
        $('> .dir',this).addClass("open");
        $('ul:first',this).css('visibility', 'visible');
    },function(){
        $(this).removeClass("click");
        $('.open',this).removeClass("open");
        $('ul:first',this).css('visibility', 'hidden');
    });

});

} 

A:

The hover event has actually two states, in other words, for the hover event there are two different events are used behind the scene and these are mouseenter and mouseleave so when you hover over an element the mouseenter event gets fired and on hovering off the element the mouseleave event gets fired, so in this case, you can't convert this event to click using two methods like hover instead, you just declare one click event handler (function) for that element.  For example, you may do something like this:
$('#element').on('click', function(e){
    //...
});

If you want to change the state of the element when another element gets clicked then you should catch the click event for that element so clicking on tnother element you may do the opposite thing.  For example, you may register a click event on $('body') so when click happens on the body then you may do the opposite thing.