MediaWiki:Common.js

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mw.loader.using('jquery', function () {
    $(document).ready(function () {
        $('.portal .body > ul > li').each(function () {
            var $this = $(this);
            if ($this.find('ul').length) {
                $this.addClass('collapsible-header');
                $this.click(function (e) {
                    // Prevent following links on header click
                    if (e.target.tagName !== 'A') {
                        e.preventDefault();
                        $this.toggleClass('open');
                        $this.children('ul').slideToggle(200);
                    }
                });
            }
        });
    });
});