window.scroll does not work in Internet Explorer 11

Question

I have the following code which works on all browsers besides on IE11. any idea what might be the issue?

function scrollIntoWarranty() {
  var offset = 50;
  var el = document.querySelector("#tr_tab_2");
  window.scroll({ top: (el.offsetTop - offset), left: 0, behavior: 'smooth' });
}

<a href="#" onclick="scrollIntoWarranty(); return false;">
  Go to warranty
</a>
<p>...</p>
<p>...</p>
<p>...</p>
<p>...</p>
<p>...</p>
<p>...</p>
<p>...</p>
<p>...</p>
<p>...</p>
<p>...</p>
<p>...</p>
<p>...</p>
<p>...</p>
<p>...</p>
<p>...</p>
<p>...</p>
<p>...</p>
<p>...</p>
<p>...</p>
<p>...</p>
<p>...</p>
<p>...</p>
<p>...</p>
<div id="tr_tab_2">Warranty</div>

Answer 1

ScrollBehavior is not supported by IE

Try this

function scrollIntoWarranty() {
  var el = document.querySelector("#tr_tab_2");
  if ('scrollBehavior' in document.documentElement.style) { // behavior is not supported by IE
    var offset = 50;
    window.scroll({ top: (el.offsetTop - offset), left: 0, behavior: 'smooth' });
  } else {
    el.scrollIntoView();
  }
}

<a href="#" onclick="scrollIntoWarranty(); return false;">
  Go to warranty
</a>
<p>...</p>
<p>...</p>
<p>...</p>
<p>...</p>
<p>...</p>
<p>...</p>
<p>...</p>
<p>...</p>
<p>...</p>
<p>...</p>
<p>...</p>
<p>...</p>
<p>...</p>
<p>...</p>
<p>...</p>
<p>...</p>
<p>...</p>
<p>...</p>
<p>...</p>
<p>...</p>
<p>...</p>
<p>...</p>
<p>...</p>
<div id="tr_tab_2">Warranty</div>