Why does the animation only work when it appears?

Question

Animation

Why only works on enter? https://codesandbox.io/s/qz4j9n5zzq

Answer 1

You call done immediately after the show change, so the element is removed immediately without waiting for the animation to finish. You need to use the onComplete callback:

leave(el, done) {
  TweenMax.to(el, 1, {
    x: 0,
    onComplete: done,
  });
},