CSS-Transforms are not possible to animate with jQuery, yet. You can do something like this:
function AnimateRotate(angle) {
// caching the object for performance reasons
var $elem = $('#MyDiv2');
// we use a pseudo object for the animation
// (starts from `0` to `angle`), you can name it as you want
$({deg: 0}).animate({deg: angle}, {
duration: 2000,
step: function(now) {
// in the step-callback (that is fired each step of the animation),
// you can use the `now` paramter which contains the current
// animation-position (`0` up to `angle`)
$elem.css({
transform: 'rotate(' + now + 'deg)'
});
}
});
}
You can read more about the step-callback here: http://api.jquery.com/animate/#step
http://jsfiddle.net/UB2XR/23/
And, btw: you don't need to prefix css3 transforms with jQuery 1.7+
Update
You can wrap this in a jQuery-plugin to make your life a bit easier:
$.fn.animateRotate = function(angle, duration, easing, complete) {
return this.each(function() {
var $elem = $(this);
$({deg: 0}).animate({deg: angle}, {
duration: duration,
easing: easing,
step: function(now) {
$elem.css({
transform: 'rotate(' + now + 'deg)'
});
},
complete: complete || $.noop
});
});
};
$('#MyDiv2').animateRotate(90);
http://jsbin.com/ofagog/2/edit
Update2
I optimized it a bit to make the order of easing, duration and complete insignificant.
$.fn.animateRotate = function(angle, duration, easing, complete) {
var args = $.speed(duration, easing, complete);
var step = args.step;
return this.each(function(i, e) {
args.complete = $.proxy(args.complete, e);
args.step = function(now) {
$.style(e, 'transform', 'rotate(' + now + 'deg)');
if (step) return step.apply(e, arguments);
};
$({deg: 0}).animate({deg: angle}, args);
});
};
Update 2.1
Thanks to matteo who noted an issue with the this-context in the complete-callback. If fixed it by binding the callback with jQuery.proxy on each node.
I've added the edition to the code before from Update 2.
Update 2.2
This is a possible modification if you want to do something like toggle the rotation back and forth. I simply added a start parameter to the function and replaced this line:
$({deg: start}).animate({deg: angle}, args);
If anyone knows how to make this more generic for all use cases, whether or not they want to set a start degree, please make the appropriate edit.
The Usage...is quite simple!
Mainly you've two ways to reach the desired result. But at the first, let's take a look on the arguments:
jQuery.fn.animateRotate(angle, duration, easing, complete)
Except of "angle" are all of them optional and fallback to the default jQuery.fn.animate-properties:
duration: 400
easing: "swing"
complete: function () {}
1st
This way is the short one, but looks a bit unclear the more arguments we pass in.
$(node).animateRotate(90);
$(node).animateRotate(90, function () {});
$(node).animateRotate(90, 1337, 'linear', function () {});
2nd
I prefer to use objects if there are more than three arguments, so this syntax is my favorit:
$(node).animateRotate(90, {
duration: 1337,
easing: 'linear',
complete: function () {},
step: function () {}
});
