Board Thread:Support Requests - Getting Technical/@comment-46819185-20201014143320/@comment-45117243-20201015180630

The animation here comes from the gif, not from the css. I'm not sure how far back this goes but I guess some old browsers may not support it. CSS animations are widely supported too but I think Internet Explorer 9 or earlier, for example, doesn't support it.

However, this code use -webkit-background-clip which is not a standard even today. Most modern browsers support it but not all of them.