Is it possible to add a transition (like in CSS) in Javascript?

Question

I have a Javascript code that shows a tooltip when hovering over an HTML element. Now I want to give this element a latency of about 6 milliseconds. In CSS it is very easy with the transition command. However, I did not find a transition style command in Javascript. Is there a solution or do I have to change to another programming language?

Javascript code:

var bghtooltipin = document.getElementById('bgh-tooltipin1');
var bghtooltipout = document.getElementById('bgh-tooltipout1');
bghtooltipin.addEventListener('mouseover', bghtooltipinmouseOver);
bghtooltipin.addEventListener('mouseout', bghtooltipoutmouseOut);

function bghtooltipinmouseOver() {
  bghtooltipout.innerHTML = 'Go to Login';
  bghtooltipout.style.color = "white";
  bghtooltipout.style.top = "0";
}

function bghtooltipoutmouseOut() {
  bghtooltipout.innerHTML = ' ';
  bghtooltipout.style.top = "-99999px"
}

Answer 1

You can use something like this:

bghtooltipout.style.transition = "all 6s";