// What to do when the document is loaded.
document.addEventListener('DOMContentLoaded', function () {
    // init materialize elements
    initSidenav();
});

function initSidenav() {
    var sidenavElements = document.querySelectorAll('.sidenav');
    // var sidenavInstances = 
    M.Sidenav.init(sidenavElements, {
    });
};