CODE EXAMPLE FOR JAVASCRIPT

onclick change image src javascript

//in html
<img id="img" data-image="user1" src="/assets/user1.jpg" onclick="change_image()" />

//in javascript
const img = document.getElementById('img');
const change_image = function() {
  if (img.dataset.image == "user1") {
  	img.src = "/assets/user2.jpg";
    img.dataset.image = "user2";
    return
  };
  
  if (img.dataset.image == "user2") {
  	img.src = "/assets/user1.jpg";
    img.dataset.image = "user1";
    return
  };
};