JSFiddle - React, Tailwind, and code Playground

JavaScript

(function() {
  "use strict";
  var imgArr = document.getElementsByClassName('imgArr');

  [].forEach.call(imgArr, function(item, i, arr) {
    var randValLeft;
    var size = {
      'widthImg': arr[i].width,
      'heightImg': arr[i].height
    };

    setInterval(function() {
      var rand = tRand(0, size.widthImg);
      motionItem();
    }, 1000);

    function tRand(min, max) {
      randValLeft = Math.floor(Math.random() * (max - min + 1));
    };

    function motionItem() {

      // arr[i].style.left = randValLeft + 'px';
      console.log(randValLeft);
    };


  });

}());