I'm trying to rotate an element using the -webkit-animation properties, but I want to be able to control the duration using jQuery and an input range slider.
Unfortunately, I'm having trouble getting it to work and I can't figure out what's causing the issue.
$('#speed').change(function() {
$('.rotate').css({'-webkit-animation': 'rotation '+this.value+'s linear infinite'});
});
Utilizing the requestAnimationFrame method is a more efficient way to control animations compared to manually adding and removing keyframes. Although adjusting and creating CSS animations can be challenging, requestAnimationFrame behaves similarly to setInterval but optimizes CPU usage by only rendering when necessary. Learn more about requestAnimationFrame here.
var spd=0, r=0, box = $('.rotate');
$('#speed').on('change', function () {
spd = +(this.value);
});
function start() {
r += spd;
box.css('transform', 'rotate(' + r + 'deg)');
requestAnimationFrame(start);
}
start();
It's a bit unusual, but an interesting approach is to recreate the animation when the speed changes. This will effectively restart the animation with the updated speed.
Check out this fiddle for a demo.
$('#speed').on('change', function () {
var element = $(".rotate"),
n = element.clone(true);
element.before(n);
$(".rotate:last").remove();
$('.rotate').css("-webkit-animation", "rotate " + (30/this.value) + "s linear infinite");
});
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