MediaWiki:Common.js

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/* Any JavaScript here will be loaded for all users on every page load. */
mw.loader.using(['mediawiki.util']).then(function () {

    function applyFormatting() {
        const container = document.querySelector("#ns-tree");
        if (!container) return;

        const items = container.querySelectorAll("li");

        // If nothing found, try again
        if (items.length === 0) {
            setTimeout(applyFormatting, 300);
            return;
        }

        items.forEach(function (li) {
            const link = li.querySelector("a");
            if (!link) return;

            const full = link.textContent;

            // Remove namespace
            let clean = full.replace(/^Drupal:/, "");

            // Count depth
            const depth = (clean.match(/\//g) || []).length;

            // Get last part
            const label = clean.split("/").pop();

            // Apply label
            link.textContent = label;

            // Apply indentation
            li.style.marginLeft = (depth * 20) + "px";

            // Style top level
            if (depth === 0) {
                link.style.fontWeight = "bold";
                li.style.marginTop = "8px";
            }
        });
    }

    // Start after page load
    $(applyFormatting);

});