CSS3 equivalent to jQuery slideUp and slideDown?

Solution 1:

You could do something like this:

#youritem .fade.in {
    animation-name: fadeIn;
}

#youritem .fade.out {
    animation-name: fadeOut;
}

@keyframes fadeIn {
    0% {
        opacity: 0;
        transform: translateY(startYposition);
    } 
    100% {
        opacity: 1;
        transform: translateY(endYposition);
    }
}

@keyframes fadeOut {
    0% {
        opacity: 1;
        transform: translateY(startYposition);
    } 
    100% {
        opacity: 0;
        transform: translateY(endYposition);
    }
}

Example - Slide and Fade:

This slides and animates the opacity - not based on height of the container, but on the top/coordinate. View example

Example - Auto-height/No Javascript: Here is a live sample, not needing height - dealing with automatic height and no javascript.
View example

Solution 2:

I changed your solution, so that it works in all modern browsers:

css snippet:

-webkit-transition: height 1s ease-in-out;
-moz-transition: height 1s ease-in-out;
-ms-transition: height 1s ease-in-out;
-o-transition: height 1s ease-in-out;
transition: height 1s ease-in-out;

js snippet:

    var clone = $('#this').clone()
                .css({'position':'absolute','visibility':'hidden','height':'auto'})
                .addClass('slideClone')
                .appendTo('body');

    var newHeight = $(".slideClone").height();
    $(".slideClone").remove();
    $('#this').css('height',newHeight + 'px');

here's the full example http://jsfiddle.net/RHPQd/

Solution 3:

So I've gone ahead and answered my own question :)

@True's answer regarded transforming an element to a specific height. The problem with this is I don't know the height of the element (it can fluctuate).

I found other solutions around which used max-height as the transition but this produced a very jerky animation for me.

My solution below works only in WebKit browsers.

Although not purely CSS, it involves transitioning the height, which is determined by some JS.

$('#click-me').click(function() {
  var height = $("#this").height();
  if (height > 0) {
    $('#this').css('height', '0');
  } else {
    $("#this").css({
      'position': 'absolute',
      'visibility': 'hidden',
      'height': 'auto'
    });
    var newHeight = $("#this").height();
    $("#this").css({
      'position': 'static',
      'visibility': 'visible',
      'height': '0'
    });
    $('#this').css('height', newHeight + 'px');
  }
});

#this {
  width: 500px;
  height: 0;
  max-height: 9999px;
  overflow: hidden;
  background: #BBBBBB;
  -webkit-transition: height 1s ease-in-out;
}

#click-me {
  cursor: pointer;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.5.1/jquery.min.js"></script>

<p id="click-me">click me</p>
<div id="this">here<br />is<br />a<br />bunch<br />of<br />content<br />sdf</div>
<div>always shows</div>

View on JSFiddle

Solution 4:

why not to take advantage of modern browsers css transition and make things simpler and fast using more css and less jquery

Here is the code for sliding up and down

Here is the code for sliding left to right

Similarly we can change the sliding from top to bottom or right to left by changing transform-origin and transform: scaleX(0) or transform: scaleY(0) appropriately.