trackingPixel.js

function insertPixel(params) {
  const pixelUrl = `https://YOUR_DISTRIBUTION.cloudfront.net/1x1.png`;
  const pixel = document.createElement("img");
  pixel.setAttribute(
    "src",
    `${pixelUrl}${params}&someunique=${getRandomNumber()}`
  );
  pixel.setAttribute("height", "1");
  pixel.setAttribute("width", "1");
  document.body.appendChild(pixel);
}