Подняться вверх страницы

      <div class="scroll-to-top">
    <svg width="14" height="9" viewBox="0 0 14 9" fill="none" xmlns="http://www.w3.org/2000/svg">
        <path d="M13 8L7 2L1 8" stroke="white" stroke-width="2"/>
    </svg>
</div>

    

      let smoothJumpUp = function() {
    if (document.body.scrollTop > 0 || document.documentElement.scrollTop > 0) {
        window.scrollBy(0,-100);
        setTimeout(smoothJumpUp, 10);
    }
}

let btn = document.querySelector('.scroll-to-top');
btn.addEventListener('click', smoothJumpUp);

function getScroll() {
    var scrolled = window.pageYOffset || document.documentElement.scrollTop;
    if (scrolled > 500) {
        document.querySelector('.scroll-to-top').style.opacity = '1';
        document.querySelector('.scroll-to-top').style.visibility = 'visible';
    } else {
        document.querySelector('.scroll-to-top').style.opacity = '0';
        document.querySelector('.scroll-to-top').style.visibility = 'hidden';
    }
}

window.addEventListener('load', getScroll);
window.addEventListener('scroll', getScroll);