Part 2 - Animating the exiting transition

Post.js

executeExitingTransition = (node, done) => {
  spring({
    from: this.from,
    to: this.to,
    stiffness: 100,
    damping: 12,
    restDelta: true,
    restSpeed: 0.1
  }).start({
    update: this.postStyler.set,
    complete: () => {
      const scrollTop = -this.pageListStyler.get('top');
      this.pageListStyler.set({ position: 'absolute', top: 0 });
      windowScroll.set('top', scrollTop);
      done();
    }
  });
};