How to add a class/selector to <img> when using <picture>

[Brodiero]

Not an issue but I'm struggling to find how to do this. In using the picture/source/img responsive setup I need to add a class directly to the element (for a different GSAP array).

I've searched the issues here and haven't found success, can anyone help?

TIA

[svirmi]

I have added class to dynamically created target image:

const pictureTagObserver = lozad("picture.lozad", {
threshold: 0.1,
load: function(el) {
const img = document.createElement("img");
const src = "https://imagesrc.io"
img.setAttribute("src", src);
img.setAttribute("class", el.getAttribute("data-class"));
el.appendChild(img);
}
});