I have a line .section__line which I'm trying to draw in on scroll (and reverse when scrolling back up).   However, my current implementation doesn't draw anything. I'm trying to get it to work by animating the lines height on scroll.    Am I missing something obvious?    I've also tried:   onEnter: () => { const scrollProgress = (window.scrollY - line.getBoundingClientRect().top + window.innerHeight * 0.2) / line.clientHeight; const progress = Math.