virtualCursor.js

let clientX = -100;
let clientY = -100;
const innerCursor = document.body.appendChild(document.createElement('div'));
innerCursor.style =
  'width:0px; height:0px; border-left: 10px solid red; border-bottom: 10px solid transparent; position:absolute; top:0; left:0; z-index:999; pointer-events:none;';
document.addEventListener('mousemove', (e) => {
  clientX = e.clientX;
  clientY = e.clientY;
});
const render = () => {
  innerCursor.style.transform = `translate(${clientX}px,${clientY}px)`;
  requestAnimationFrame(render);
};
requestAnimationFrame(render);