export default function () { var classnames; document.addEventListener('turbolinks:before-visit', function (evnt) { classnames = document .querySelector('.mm-wrapper') .className.split(' ') .filter(function (name) { return /mm-/.test(name); }); }); document.addEventListener('turbolinks:load', function (evnt) { if (typeof classnames === 'undefined') { return; } document.querySelector('.mm-wrapper').className = classnames; }); }