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Random BG Image for Projects Background

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Hi! So basically what I'm trying to do is: 
- Whenever I go to my webstite (www.a2-foto.com), there's a fixed Background Image 
- I want this first background image to be random from an array / selection 
- Currently one can only upload ONE image at a time 

I know this is possible using css/javascript 
but I'm not sure which selectors to use, etc. Someone can help? 🙂

iScreen Shoter - Safari - 240702182134.jpg

iScreen Shoter - Safari - 240702182235.jpg

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Try the code discussed here:


Please like and upvote if my comments were helpful to you. Cheers!

Zygmunt Spray
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Posted (edited)

@Ziggy  I tried it but it was showing an image for 1ms. 
I asked ChatGTP for help and it worked, but I needed to do 2 steps: 

(1) Add a DARK image as a background in the homepage, for the project categories. 

   - this is to prevent a 1milisecond image jump that was really annoying

(2) Add the code you suggested, but with some modifications: 

     - Added a code to prevent the same image to show twice in a row after reload.
    - The images popped up abruptly, so now they have a 'fade-in' effect.  


.fade-in {
   opacity: 0;
   transition: opacity 1s ease-in-out;
 .fade-in.show {
    opacity: 1;


<script type="text/javascript">
document.addEventListener('DOMContentLoaded', function() {
  var images = [

  // Function to get a new random image that is not the same as the last one
  function getRandomImage() {
    var lastImage = localStorage.getItem('lastImage');
    var randImage;
    do {
      randImage = images[Math.floor(Math.random() * images.length)];
    } while (randImage === lastImage);
    localStorage.setItem('lastImage', randImage);
    return randImage;

  var randImage = getRandomImage();
  var imgEl = document.querySelector(".homepage article.sections section:first-child .section-background img");

  imgEl.classList.add('fade-in'); // Add fade-in class
  imgEl.src = randImage + '?v=' + Math.random(); // Add a query parameter to prevent caching
  imgEl.setAttribute("srcset", "");

  imgEl.onload = function() {
    imgEl.classList.add('show'); // Add show class after image is loaded


iScreen Shoter - Safari - 240703122800.jpg

Edited by A2_foto
forgot to add screenshot
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