How to make a smooth, not jerky scrollTop in Angular v.1?

Question

Angular

Actually the whole question in the topic. Looked around a bunch of resources, found nothing. That delay, then twitches, everything is not of high quality.

Answer 1

It's just not clear what Angular has to do with it.

// Плавная прокрутка в начало
document.querySelector('.goTop').addEventListener('click', function() {
  return up();
});

function up() {
  // чем меньше значение, тем выше скорость перемещения
  window.scrollBy(0, -30);
  // если значение меньше нуля, то скролл на верху
  if (window.pageYOffset > 0) {
    return requestAnimationFrame(up);
  }
};