JSFiddle - React, Tailwind, and code Playground

HTML

<div id="scene">
    <div class="object">
    </div>
    <div id="xy">asd</div>
</div>

CSS

#scene {
    position: absolute;
    left: 50%;
    top: 50%;
    width: 200px;
    height: 200px;
    margin: -100px 0 0 -100px;
    background-color: red;
}

.object {
    position: absolute;
    left: 50px;
    top: 50px;
    width: 50px;
    height: 50px;
    background-color: blue;
}

#xy {
  position: fixed;
  z-index: 10000;
  top: 20px;
  left: 20px;
  width: 200px;
  height: 200px;
}

JavaScript

var object = document.getElementsByClassName('object'),
scene = document.getElementById('scene');

function initMove() {

for(var i=0; i<object.length; i++) {

  object[i].addEventListener("mousemove", function(event) {
    return false;
  }, false);
}

scene.addEventListener("mousemove", function (event) {
  //event.stopPropagation();
  //event.currentTarget;
  moveX = event.clientX - scene.offsetLeft;
  moveY = event.clientY - scene.offsetTop;
  document.getElementById('xy').innerText = `x${moveX}:y${moveY}`;
}, false);

}

function init() {
  initMove();
  document.onselectstart = function(){ return false; }
};

init();