add mouse over event listener code example

Example 1: addeventlistener hover js

let test = document.getElementById("test");

test.addEventListener("mouseover", function( event ) {
  alert("mouse over test!")
  , false);

Example 2: javascript hover event

element.onmouseover = function() {
  //Hovering
}

Example 3: css change text on hover

Check this:
https://codepen.io/DevLorenzo/pen/vYXbJvd