MediaWiki:Common.js

document.addEventListener("DOMContentLoaded", function () {
    setTimeout(function () { 
        var toc = document.querySelector("#mw-content-text #toc"); 
        if (!toc) return; 

        var floatingToc = document.createElement("div");
        floatingToc.id = "floating-toc";

        toc.parentNode.removeChild(toc); 
        floatingToc.appendChild(toc);
        document.body.appendChild(floatingToc);

        floatingToc.addEventListener("click", function () {
            floatingToc.classList.toggle("collapsed");
        });

    }, 500); 
});