gistfile1.txt

CODE IN PAGE:

	window.addEventListener('load', function() {
		navigator.serviceWorker.register('/sw.js').then(function(registration) {
			console.log('ServiceWorker registration successful with scope: ', registration.scope);
		}).catch(function(err) {
			console.log('ServiceWorker registration failed: ', err);
		});
	});
	
SW.JS	
	
	self.addEventListener('install', function(event) {
  event.waitUntil(
    caches.open(CACHE_NAME)
      .then(function(cache) {
      		console.log("(sw) will call cache.addAll()");
			/*
				Include only internal URL, other like Font awesome and fonts are not really required
			*/
			return cache.addAll([
				'/worngfile.png'
			]).then(function() {
				console.log("(sw) cache.addAll done");
			});
      })
  );
});