MediaWiki:Common.js

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/* Any JavaScript here will be loaded for all users on every page load. */
document.addEventListener("DOMContentLoaded", function () {
    const container = document.querySelector("#ns-tree");
    if (!container) return;

    const links = container.querySelectorAll("li a");

    links.forEach(link => {
        const title = link.textContent;
        const depth = (title.match(/\//g) || []).length;

        link.parentElement.style.marginLeft = (depth * 20) + "px";
    });
});