CSS3 equivalent to jQuery slideUp and slideDown?

Question

My application is performing poorly with jQuery\'s slideDown and slideUp. I\'m looking to use a CSS3 equivalent in browsers which support it.

Is it possible, using C

Answer 1

you can't make easisly a slideup slidedown with css3 tha's why I've turned JensT script into a plugin with javascript fallback and callback.

in this way if you have a modern brwowser you can use the css3 csstransition. if your browser does not support it gracefuly use the old fashioned slideUp slideDown.

 /* css */
.csstransitions .mosneslide {
  -webkit-transition: height .4s ease-in-out;
  -moz-transition: height .4s ease-in-out;
  -ms-transition: height .4s ease-in-out;
  -o-transition: height .4s ease-in-out;
  transition: height .4s ease-in-out;
  max-height: 9999px;
  overflow: hidden;
  height: 0;
}

the plugin

(function ($) {
$.fn.mosne_slide = function (
    options) {
    // set default option values
    defaults = {
        delay: 750,
        before: function () {}, // before  callback
        after: function () {} // after callback;
    }
    // Extend default settings
    var settings = $.extend({},
        defaults, options);
    return this.each(function () {
        var $this = $(this);
        //on after
        settings.before.apply(
            $this);
        var height = $this.height();
        var width = $this.width();
        if (Modernizr.csstransitions) {
            // modern browsers
            if (height > 0) {
                $this.css(
                    'height',
                    '0')
                    .addClass(
                        "mosne_hidden"
                );
            } else {
                var clone =
                    $this.clone()
                    .css({
                        'position': 'absolute',
                        'visibility': 'hidden',
                        'height': 'auto',
                        'width': width
                    })
                    .addClass(
                        'mosne_slideClone'
                )
                    .appendTo(
                        'body'
                );
                var newHeight =
                    $(
                        ".mosne_slideClone"
                )
                    .height();
                $(
                    ".mosne_slideClone"
                )
                    .remove();
                $this.css(
                    'height',
                    newHeight +
                    'px')
                    .removeClass(
                        "mosne_hidden"
                );
            }
        } else {
            //fallback
            if ($this.is(
                ":visible"
            )) {
                $this.slideUp()
                    .addClass(
                        "mosne_hidden"
                );
            } else {
                $this.hide()
                    .slideDown()
                    .removeClass(
                        "mosne_hidden"
                );
            }
        }
        //on after
        setTimeout(function () {
            settings.after
                .apply(
                    $this
            );
        }, settings.delay);
    });
}
})(jQuery);;

how to use it

/* jQuery */
$(".mosneslide").mosne_slide({
    delay:400,
    before:function(){console.log("start");},
    after:function(){console.log("done");}
});

you can find a demo page here http://www.mosne.it/playground/mosne_slide_up_down/