Function which works as window.scrollTo(0, y), but much prettier. :)

animatedScrollTo.ts

export const animatedScrollTo = (scrollValue: number, duration: number = 350): void =>
{
    const value = Math.max(0, scrollValue);
    const animationStart = performance.now();
    const currentScroll = window.pageYOffset;
    const scrollDelta = value - currentScroll;

    const update = (): void =>
    {
        const currentTimestamp = performance.now();

        if (currentTimestamp >= animationStart + duration)
        {
            window.scrollTo(0, value);
            return;
        }

        requestAnimationFrame(update);

        const percentageFinished = (currentTimestamp - animationStart) / duration;
        window.scrollTo(0, currentScroll + percentageFinished * scrollDelta);
    };

    requestAnimationFrame(update);
};