查看“MediaWiki:Common.js”的源代码

/* 这里的任何JavaScript将为所有用户在每次页面载入时加载。 */
document.addEventListener("DOMContentLoaded", function () {
    const tocLinks = Array.from(document.querySelectorAll("#toc a"));
    const sections = tocLinks.map(link => {
        const hash = link.getAttribute("href").slice(1);
        const target = document.getElementById(hash) || document.querySelector(`[id="${CSS.escape(hash)}"]`);
        return target ? { link, target } : null;
    }).filter(Boolean);

    function updateHighlight() {
        const scrollY = window.scrollY + 120;
        let current = null;

        for (let section of sections) {
            if (section.target.offsetTop <= scrollY) {
                current = section;
            } else {
                break;
            }
        }

        tocLinks.forEach(l => l.classList.remove("active-section"));
        if (current) current.link.classList.add("active-section");
    }

    updateHighlight();
    window.addEventListener("scroll", updateHighlight);
});