…can control the state of the menu in a slightly different way. We’re going to manipulate animations in a class that gets removed when the time of transition ends, by using the transitionend function in JavaScript.Smooth as Butter: Achieving 60 FPS Animations with CSS39K65José RosárioIan SinnottFollowJul 10, 2017 · 1 min readI’m a little unclear on this point. What is the benefit of removing the class? Why is it a perf win?