Add basic scaffolding for site.

themes/mainroad/static/js/menu.js

@@ -0,0 +1,25 @@
+'use strict';
+
+(function iifeMenu(document, window, undefined) {
+	var menuBtn = document.querySelector('.menu__btn');
+	var	menu = document.querySelector('.menu__list');
+
+	function toggleMenu() {
+		menu.classList.toggle('menu__list--active');
+		menu.classList.toggle('menu__list--transition');
+		this.classList.toggle('menu__btn--active');
+		this.setAttribute(
+			'aria-expanded',
+			this.getAttribute('aria-expanded') === 'true' ? 'false' : 'true'
+		);
+	}
+
+	function removeMenuTransition() {
+		this.classList.remove('menu__list--transition');
+	}
+
+	if (menuBtn && menu) {
+		menuBtn.addEventListener('click', toggleMenu, false);
+		menu.addEventListener('transitionend', removeMenuTransition, false);
+	}
+}(document, window));