Modern browsers, JavaScript libraries, and CSS3 have made it easier than ever to create exciting, dynamic animated experiences within web interfaces. But we have also seen the unfortunate side effect of trying to do too much: websites that are resource hogs, eating up bandwidth and slowing load times to a crawl, all for effects that are ultimately just there for the “show” factor. This talk will discuss how to use these animation skills for good: to establish context, convey status, give feedback, and yes, even add a little delight. Along the way, we’ll discuss the principles of animation that guide everything from your favorite feature films to the actions of a button on your screen, and learn how deliberate animation choices can improve the experience for your user. We will also touch on the available tools in JS and CSS and how to choose which one is the right one for your animation task.