Closures in Javascript

// https://github.com/ai/nanoid
//A tiny, secure, URL-friendly, unique string ID generator for JavaScript.
let nanoid=(t=21)=>crypto.getRandomValues(new Uint8Array(t)).reduce(((t,e)=>t+=(e&=63)<36?e.toString(36):e<62?(e-26).toString(36).toUpperCase():e>62?"-":"_"),"");

function Counter () {
  let count = 0
  function View () {
    let uuid = nanoid()  
    let div = document.createElement("div")
    div.innerHTML = `
      <h1 id=display-${uuid}>${count}</h1>
      <button id=counter-${uuid}>CLICK</button>
    `
    let target = div.querySelector(`#display-${uuid}`) 
    let btn = div
      .querySelector(`#counter-${uuid}`)
      .onclick =  () => target.innerText = ++count 
    return div
  }
  return View ()
}

[...Array(5)].forEach(() => document.body.append(Counter()))

// allow pausing while rotate
function sleep(ms = 0) {
    return new Promise(resolve => setTimeout(resolve, ms));
}

// returns an object containing the closure and the refrenced image
function rotateImage (id) {
  let angle = 0;
  let prevangle = 0
  let img = document.getElementById(id);
  async function _rotateImg () {
    while (angle < prevangle + 90) {
      angle += 19;
      await sleep(0)
      img.style.transform = `rotate(${angle}deg)` ;
    }
    let rest = angle % 90;
    // increment is not a divisor of 90
    // we adjust the rotation
    if (rest > 0) {
      while (rest > 0) {
         rest -= 1
        await sleep(0)
        img.style.transform = `rotate(${--angle}deg)` ;
      }
    }
    img.dataset.angle = angle
    prevangle = angle
    checkImages()
  }
  return { rotator: _rotateImg, image:img } ;
}

// we check if all images are in nomal position
function checkImages () {
  let aligned = [imagegRotator, imagegRotator2].reduce( 
    function check (acc,imgrot) {
      return  (imgrot.image.dataset.angle % 360 === 0) && acc
   }
 , true);
 if (aligned) { 
   message.innerText = ("We are two cutes American Pit Bull Terrier")
 }
 else {
    message.innerText = ""
 }
}

function main () {
  // we have to declare those variable as globals
  // to attach onclick events
  window.imagegRotator = rotateImage("image");
  window.imagegRotator2 = rotateImage("image2");
  checkImages ()
  console.log(Object.keys(imagegRotator));

}

main()