Simple JavaScript function for preloading images

preloadImages.js

/**
 * A function to preload images into the browser cache
 * 
 * @param {string[]} imagePaths - Links to images you want to preload.
 * 
 * @example
 * const images = [
 *   "/relative/path/preload-me.png",
 *   "https://github.githubassets.com/images/modules/site/home/globe.jpg",
 *   "https://about.google/assets-main/img/glue-google-color-logo.svg"
 * ];
 * preloadImages(images);
 * 
 */
function preloadImages(imagePaths) {
  const img = new Image();
  const iterator = imagePaths.values();
  img.addEventListener('load', () => {
    const entry = iterator.next();
    if (!entry.done) {
      img.src = entry.value;
    }
  });
  img.src = iterator.next().value;
}