MediaWiki:Common.js

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/* Any JavaScript here will be loaded for all users on every page load. */

// COLLAPSIBLE HEADERS
$(document).ready(function () {
    $(".collapsible-header").each(function () {
        var header = $(this);
        var content = header.next(".collapsible-content");
        if (content.length === 0) return;
        var startsOpen = header.hasClass("open");
        var arrow = startsOpen ? "▲" : "▼";
        header.prepend('<span class="collapse-toggle" aria-hidden="true">' + arrow + '</span>');
        if (!startsOpen) content.hide();
        header.on("click", function () {
            content.slideToggle(150);
            header.toggleClass("open");
            var icon = header.hasClass("open") ? "▲" : "▼";
            header.find(".collapse-toggle").text(icon);
        });
    });
});