scrollTop window code example

Example 1: js scrollto

element.scrollTo(x, y);
window.scrollTo(x, y);
element.scrollTo({
  top: 100,
  left: 100,
  behavior: 'smooth'
});

Example 2: html scroll div to top

var myDiv = document.getElementById('containerDiv');
myDiv.innerHTML = variableLongText;
myDiv.scrollTop = 0;