CSS filters, GIFs, and performanceA few months ago, I blatantly ripped off Charlie Gleason’s idea. His presentation at MelbJS featured greyscale, full-screen, animated GIFs (of his own face, among other things) behind the text on many slides. I discovered that he’d painstakingly edited and optimised each GIF in Photoshop so it looked good behind the text on each slide. I wanted to do the same thing, but without all that work. The
