Automatic Hiding of Dropdown Menu in Twitter Bootstrap: A Quick Guide to Set a 2-Second Timer

Is there a way to make the dropdown menu hide automatically after the mouse cursor leaves the area?

If you take a look at Amazon.com for example, when you hover over "Shop by Department" and then quickly move your cursor away and back within about half a second, the dropdown menu stays visible.

Check out this Bootstrap Snippet:

I thought about using a setTimeout, but that might hide the dropdown even if I bring my cursor back within those few seconds. Maybe clearing the setTimeout on mouseOver could solve this issue?

How do people typically handle this situation?

csstwitter-bootstrapdrop-down-menu

Answer №1

For the desired functionality, it is important to include 

var x = setTimeout('hideme()',2000)
when the mouseout event occurs and to cancel clearTimeout(x) during the mousein callback.

Answer №2

Here is another suggestion to handle hover events...

Instead of directly handling the hover event, create a function that takes in the element and the event as parameters. This way, you can easily differentiate between mouseenter and mouseleave events. You can use function properties to store and clear timers as needed.

Check out this example on JSFiddle


var handleHover = function(evObj){
    var $this = $(this);

    if(!$this.hasClass('open')){
        return true;
    }

    if(evObj.type === 'mouseleave'){
        //    Handle mouseleave event...
        handleHover.timer = setTimeout(function(){
            $this.removeClass('open');
        },2000);

    } else if(evObj.type === 'mouseenter'){
        //    Handle mouseenter event...
        if(handleHover.timer){    //    Clear existing timer
            clearTimeout(handleHover.timer);
            delete handleHover.timer;
        }
    }
};

$('#myDropDown').hover(handleHover);

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