yaharga yaharga - 6 months ago 14
CSS Question

Unwanted CSS delay when setting transition duration?

I want the menu to close in the same duration it takes for it to open. For some reason, it delays when closing, along with show some extra space I have no idea where it comes from. Here is the jsfiddle: https://jsfiddle.net/m9pd8bjh/7/

Here's the CSS code in case you see something wrong immediately:

.hide {
visibility: hidden;
overflow: hidden;
max-height: 0;
}

input[type=checkbox]:checked~.toggleable {
visibility: visible;
overflow: visible;
max-height: 1000px;
}

.toggleable {
transition: visibility 5s ease-in-out, overflow 2.5s ease-in-out, max-height 2.5s ease-in-out;
}


I'm using a checkbox-label combination to trigger the opening and closing of the menu.

Answer

The first thing you need to understand is that the visibility property in CSS cannot be animated. This is due to it only having two states (either visible or hidden, nothing in between to facilitate the animation).

If you want to make a fade-in effect, you can use opacity:0; to opacity:1; and give that a transition instead.

The next thing to note is that your animation time is very long, and if you are animating a max-width, you need to shorten the animation time to adjust.

See fiddle : https://jsfiddle.net/m9pd8bjh/12/

And CSS:

.toggleable {
  transition: max-height 0.25s ease-in-out;
}

If you specifically want that long animation timeframe, then you will have to use something other than a max-height solution.

This would then become a new avenue to approach as you would have to use JavaScript, jQuery or some other such framework.

For future reference, here is a fiddle doing the same using jQuery: https://jsfiddle.net/m9pd8bjh/15/

And here is the jQuery code:

$('.toggler').click(function(){
    $('.hide').slideToggle();
});
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