SpinKit uses CSS animations to create smooth and easily customizable animations. You have to note that spinners use CSS3 animation.

Grab the HTML and CSS for a spinner and include it in your project. Note that a hidden spinner (opacity: 0, or visibility: hidden) will still animate. After hiding a spinner, it's recommended to remove it from the DOM, set display: none or pause the animation by setting animation-play-state: paused.