'); const $header = $('header:first').length ? $('header:first') : $('#masthead').length ? $('#masthead') : $('body'); $header.append($toggle); $toggle.on('click', function () { $target.toggle(); }); } addToggleIfNeeded(); const observer = new MutationObserver(function () { addToggleIfNeeded(); }); observer.observe(document.body, { childList: true, subtree: true }); });