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$('html').click(function(event) {
	if ($(event.target).closest('.sidemenu, .menu-button').length === 0) {
		$('.sidemenu').removeClass('open');
	}
});

$('.menu-button').on('click', function(e) {
	if ($('.sidemenu').hasClass('open')) {
		$('.sidemenu').removeClass('open');
	} else {
		$('.sidemenu').addClass('open');
	}
});