Raw Source
sytha / CowcotLand Helper 

// ==UserScript==
// @name         CowcotLand Helper
// @namespace    https://www.cowcotland.com
// @version      0.3
// @description  Make CowcotLand great again.
// @author       sytha
// @match        https://www.cowcotland.com/*
// @match        https://cowcotland.com/*
// @grant        none
// @license      GPL-3.0-or-later
// @updateURL    https://openuserjs.org/meta/sytha/CowcotLand_Helper.meta.js
// ==/UserScript==

(function() {
    "use strict";

    const animationDurations = 100;

    const imageLinks = document.querySelectorAll("a[onclick*=\"popup_image\"]");
    imageLinks.forEach(element => {
        // Remove the initial onclick listener
        element.onclick = event => event.preventDefault();
        // Remove the title to prevent the "Click here to zoom" from appearing in the Lightbox
        element.title = "";
        // Add the data-lightbox attribute
        element.setAttribute("data-lightbox", "page-images");
    });

    // Lightbox script from CloudFlare CDN
    const lbScript = document.createElement("script");
    lbScript.type = "text/javascript";
    lbScript.src = "https://cdnjs.cloudflare.com/ajax/libs/lightbox2/2.11.1/js/lightbox.min.js";
    // Lightbox style from CloudFlare CDN
    const lbStyle = document.createElement("link");
    lbStyle.href = "https://cdnjs.cloudflare.com/ajax/libs/lightbox2/2.11.1/css/lightbox.min.css";
    lbStyle.rel = "stylesheet";

    // Inject the script & style in the page <head>
    document.head.appendChild(lbScript);
    document.head.appendChild(lbStyle);

    lbScript.addEventListener("load", event => {
        lightbox.option({
            albumLabel: "Image %1 sur %2",
            resizeDuration: animationDurations,
            fadeDuration: animationDurations,
            imageFadeDuration: animationDurations,
        });
    });
})();