SpinKit
A collection of loading indicators animated with CSS
...Add a spinner to your project by copy-pasting HTML from spinkit.css or examples.html. Add the sk-center utility class to the spinner to center it (it sets margin to auto). By default, the width and height of all spinners are set to 40px. background-color is set to #333. Configure the spinner by overwriting the CSS variables, primarily --sk-size (spinner width & height) and --sk-color (spinner color). If you need broader browser support, remove the CSS variables.