JSFiddle - React, Tailwind, and code Playground

HTML

<input type="button" id="add" value="add"/>

JavaScript

document.getElementById("add").onclick = function () {
    for (y = 1; y < 18; y++) {
        var img = document.createElement("img");
        if (y < 10) {
            img.src = "http://example.net/test%20page/00" + y + ".jpg";
        } else {
            img.src = "http://example.net/test%20page%20/0" + y + ".jpg";
        }

        document.body.appendChild(img);
    }
};