JS Animate DOM Node

moveItem.js

const moveItem = (el, distance, duration) => {

  const invokedTime = new Date().getTime();
  let delta = distance/duration;
  let animFrame = null;

  const doMove = () => {
    const elapsedTime = (new Date().getTime()) - invokedTime;
    if (elapsedTime > duration) {
      cancelAnimationFrame(animFrame);
      el.style.left = `${distance}px`
      return;
    } else {
      el.style.left = `${delta * elapsedTime}px`
    }
    animFrame = requestAnimationFrame(doMove);  
  }

  doMove()

}