om/public/main.js

/******************************************************
 * Main JavaScript file - Entry point of all JS files *
 ******************************************************/

// NOTE: ServiceWorker Registration
if ('serviceWorker' in navigator) {
	window.addEventListener('load', function () {
		// Register a service worker hosted at the root of the
		// site using the default scope ('/').
		return navigator.serviceWorker.register('serviceWorker.js', {
			scope: '/'
		}).then(function (registration) {
			return console.log('[ServiceWorker] Registration succeeded: ', registration);
		}).catch(function (error) {
			return console.log('[Service worker] Registration failed: ', error);
		});
	});
} else {
	console.log('[ServiceWorker] are not supported.');
}

// NOTE: Set Bootstrap materialdesign
document.addEventListener("DOMContentLoaded", function () {
	$('body').bootstrapMaterialDesign();
}, false);