const easingOutQuint = (x, t, b, c, d) => c * ((t = t / d - 1) * t * t * t * t + 1) + b; const scroll = (node, key, target) => { const startTime = Date.now(); const offset = node[key]; const gap = target - offset; const duration = 1000; let interrupt = false; const step = () => { const elapsed = Date.now() - startTime; const percentage = elapsed / duration; if (percentage > 1 || interrupt) { return; } node[key] = easingOutQuint(0, elapsed, offset, gap, duration); requestAnimationFrame(step); }; step(); return () => { interrupt = true; }; }; export const scrollRight = (node) => scroll(node, 'scrollLeft', node.scrollWidth); export const scrollTop = (node) => scroll(node, 'scrollTop', 0);