MediaWiki:Common.js

/* Any JavaScript here will be loaded for all users on every page load. */
document.addEventListener("DOMContentLoaded", function() {
    document.getElementById("p-cactions")?.remove(); // Remove "Page tools"
    document.getElementById("p-tb")?.remove(); // Remove "More"
    document.getElementById("catlinks")?.remove(); // Remove "Categories"
});

document.addEventListener("DOMContentLoaded", function() {
    if (!mw.config.get("wgUserName")) { // If user is not logged in
        document.getElementById("ca-viewsource")?.remove();
    }
});