I'm going to take a deeper look into CSS Animations and how they fit (or don't fit) into a modern animator's workflow. You'll see exactly where some of the pain points are for a typical project and how they can bring your workflow to a grinding halt.
GSAP is a suite of tools for scripted, high-performance HTML5 animations that work in all major browsers. No other library delivers such advanced sequencing, API efficiency, and tight control. Stop wrestling with cumbersome CSS animations, stuttery jQuery.animate() calls, or a system that limits your creativity. Use animation to tell a story in a rich way rather than settling for a few fades and slides.