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The UnCloud

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Basically UNCLOUD?

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Once upon a time… 1980s

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…fast forward 2010s

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Something happened 1980s 2010s

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TL;DR: 2007

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@cedmax Front end
 developer since able to grow a beard. 90s/00s

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Basically postAPPSERA

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Challenges Privacy Security Design & Ux Context APIs access …

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The web? 2004

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The web…

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…was different

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Adapt 2008/9

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Adapt 2008/9

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“The landscape is shifting, perhaps more quickly than we might like.” 
 Ethan Marcotte
 http://alistapart.com/article/responsive-web-design 2010

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Flexibility 2008/9

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Catch up

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“Mobile browsing is expected to outpace desktop-based access within three to five years.” 
 Ethan Marcotte
 http://alistapart.com/article/responsive-web-design

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Challenges Privacy Security Design & Ux Context APIs access …

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Network perception

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Internet

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“I intend to protect a free and open Internet, extend its reach to every classroom, and every community, and help folks build the fastest network.” 
 Barack Obama, President of USA
 https://www.whitehouse.gov/blog/2015/01/20/watch-president-obamas-2015-state-union

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offline is a big deal

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Application Cache 2010

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# offline.appcache CACHE MANIFEST assets/v6/script/script.min.js assets/v6/style/main.min.css assets/v6/style/font/pro.ttf assets/v6/style/img/sprites.png

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Biggest 
 problem Cache First Only
 &
 The Cache only updates if 
 the manifest itself changes

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“We all know someone who needs “observing” more than others in case they do something really stupid. ApplicationCache is one of those people” 
 Jake Archibald
 http://alistapart.com/article/application-cache-is-a-douchebag 2012

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Basically current state

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you might have heard of

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“A service worker is a script that is run by your browser in the background, separate from a web page, opening the door to features which don’t need a web page or user interaction.” 
 Matt Gaunt
 http://www.html5rocks.com/en/tutorials/service-worker/introduction/

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Pretty powerful

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but with great powers…

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Can’t access the DOM Can’t hold a state[1] It’s event driven 
 can access IndexDB API [1] serviceworker.js

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self.addEventListener('install', function(event) { //[…] }); self.addEventListener('activate', function(event) { //[…] }); self.addEventListener('fetch', function(event) { //[…] });

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a working example

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// script.js if (navigator.serviceWorker) { navigator.serviceWorker.register('/serviceworker.js'); }

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// serviceworker.js var staticCacheName = 'cache-v1'; var urlsToCache = [ '/', '/styles/main.css', '/script/main.js', '/offline' ]; function updateStaticCache() { return caches.open(staticCacheName) .then(function(cache) { return cache.addAll(urlsToCache); }); }; self.addEventListener('install', function (event) { event.waitUntil(updateStaticCache()); });

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// serviceworker.js var staticCacheName = 'cache-v1'; var urlsToCache = [ '/', '/styles/main.css', '/script/main.js', '/offline' ]; function updateStaticCache() { return caches.open(staticCacheName) .then(function(cache) { return cache.addAll(urlsToCache); }); }; self.addEventListener('install', function (event) { event.waitUntil(updateStaticCache()); });

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// serviceworker.js var staticCacheName = 'cache-v1'; var urlsToCache = [ '/', '/styles/main.css', '/script/main.js', '/offline' ]; function updateStaticCache() { return caches.open(staticCacheName) .then(function(cache) { return cache.addAll(urlsToCache); }); }; self.addEventListener('install', function (event) { event.waitUntil(updateStaticCache()); });

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// serviceworker.js var staticCacheName = 'cache-v1'; var urlsToCache = [ '/', '/styles/main.css', '/script/main.js', '/offline' ]; function updateStaticCache() { return caches.open(staticCacheName) .then(function(cache) { return cache.addAll(urlsToCache); }); }; self.addEventListener('install', function (event) { event.waitUntil(updateStaticCache()); });

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// serviceworker.js var staticCacheName = 'cache-v1'; var urlsToCache = [ '/', '/styles/main.css', '/script/main.js', '/offline' ]; function updateStaticCache() { return caches.open(staticCacheName) .then(function(cache) { return cache.addAll(urlsToCache); }); }; self.addEventListener('install', function (event) { event.waitUntil(updateStaticCache()); });

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“When the user navigates to your site, the browser tries to redownload the script file that defined the service worker in the background.” 
 Matt Gaunt
 http://www.html5rocks.com/en/tutorials/service-worker/introduction/

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// serviceworker.js var staticCacheName = ‘cache-v2'; var clearOldCaches = function() { return caches.keys().then(function(keys) { return Promise.all( keys.filter(function (key) { return key.indexOf(version) != 0; }).map(function (key) { return caches.delete(key); }) ); }) } self.addEventListener("activate", function(event) { event.waitUntil(clearOldCaches()) });

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// serviceworker.js var staticCacheName = ‘cache-v2'; var clearOldCaches = function() { return caches.keys().then(function(keys) { return Promise.all( keys.filter(function (key) { return key.indexOf(version) != 0; }).map(function (key) { return caches.delete(key); }) ); }) } self.addEventListener("activate", function(event) { event.waitUntil(clearOldCaches()) });

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// serviceworker.js var staticCacheName = ‘cache-v2'; var clearOldCaches = function() { return caches.keys().then(function(keys) { return Promise.all( keys.filter(function (key) { return key.indexOf(version) != 0; }).map(function (key) { return caches.delete(key); }) ); }) } self.addEventListener("activate", function(event) { event.waitUntil(clearOldCaches()) });

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// serviceworker.js self.addEventListener('fetch', function(event) { //Where the magic lives });

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cache first

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// serviceworker.js self.addEventListener('fetch', function(event) { event.respondWith( caches.match(request) .then(function (response) { return response || fetch(request) .catch(handleFailure) }) ); });

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// serviceworker.js self.addEventListener('fetch', function(event) { event.respondWith( caches.match(request) .then(function (response) { return response || fetch(request) .catch(handleFailure) }) ); });

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// serviceworker.js self.addEventListener('fetch', function(event) { event.respondWith( caches.match(request) .then(function (response) { return response || fetch(request) .catch(handleFailure) }) ); });

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// serviceworker.js self.addEventListener('fetch', function(event) { event.respondWith( caches.match(request) .then(function (response) { return response || fetch(request) .catch(handleFailure) }) ); });

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// serviceworker.js self.addEventListener('fetch', function(event) { event.respondWith( caches.match(request) .then(function (response) { return response || fetch(request) .catch(handleFailure) }) ); });

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network first

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// serviceworker.js self.addEventListener('fetch', function(event) { event.respondWith( fetch(request, { credentials: 'include' }) .catch(function () { return caches.match(request) .then(function (response) { return response || caches.match('/offline'); }) }) ); });

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// serviceworker.js self.addEventListener('fetch', function(event) { event.respondWith( fetch(request, { credentials: 'include' }) .catch(function () { return caches.match(request) .then(function (response) { return response || caches.match('/offline'); }) }) ); });

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// serviceworker.js self.addEventListener('fetch', function(event) { event.respondWith( fetch(request, { credentials: 'include' }) .catch(function () { return caches.match(request) .then(function (response) { return response || caches.match('/offline'); }) }) ); });

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// serviceworker.js self.addEventListener('fetch', function(event) { event.respondWith( fetch(request, { credentials: 'include' }) .catch(function () { return caches.match(request) .then(function (response) { return response || caches.match('/offline'); }) }) ); });

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// serviceworker.js self.addEventListener('fetch', function(event) { event.respondWith( fetch(request, { credentials: 'include' }) .catch(function () { return caches.match(request) .then(function (response) { return response || caches.match('/offline'); }) }) ); });

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// serviceworker.js self.addEventListener('fetch', function(event) { event.respondWith( fetch(request, { credentials: 'include' }) .catch(function () { return caches.match(request) .then(function (response) { return response || caches.match('/offline'); }) }) ); });

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not a GET?

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// serviceworker.js self.addEventListener('fetch', function(event) { var request = event.request; if (request.method !== 'GET') { event.respondWith( fetch(request) .catch(function () { return caches.match('/offline'); }) ); return; } });

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// serviceworker.js self.addEventListener('fetch', function(event) { var request = event.request; if (request.method !== 'GET') { event.respondWith( fetch(request) .catch(function () { return caches.match('/offline'); }) ); return; } });

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// serviceworker.js self.addEventListener('fetch', function(event) { var request = event.request; if (request.method !== 'GET') { event.respondWith( fetch(request) .catch(function () { return caches.match('/offline'); }) ); return; } });

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// serviceworker.js self.addEventListener('fetch', function(event) { var request = event.request; if (request.method !== 'GET') { event.respondWith( fetch(request) .catch(function () { return caches.match('/offline'); }) ); return; } });

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wrapping up

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// serviceworker.js function isHMTL(request){ return request.headers.get('Accept') .indexOf('text/html') !== -1; } self.addEventListener('fetch', function(event) { var request = event.request; if (request.method !== 'GET') { return networkOnly(event); } if (isHTML(request)) { return networkFirst(event); } else { return cacheFirst(event); } });

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// serviceworker.js function isHMTL(request){ return request.headers.get('Accept') .indexOf('text/html') !== -1; } self.addEventListener('fetch', function(event) { var request = event.request; if (request.method !== 'GET') { return networkOnly(event); } if (isHTML(request)) { return networkFirst(event); } else { return cacheFirst(event); } });

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// serviceworker.js function isHMTL(request){ return request.headers.get('Accept') .indexOf('text/html') !== -1; } self.addEventListener('fetch', function(event) { var request = event.request; if (request.method !== 'GET') { return networkOnly(event); } if (isHTML(request)) { return networkFirst(event); } else { return cacheFirst(event); } });

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// serviceworker.js function isHMTL(request){ return request.headers.get('Accept') .indexOf('text/html') !== -1; } self.addEventListener('fetch', function(event) { var request = event.request; if (request.method !== 'GET') { return networkOnly(event); } if (isHTML(request)) { return networkFirst(event); } else { return cacheFirst(event); } });

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service workers give you control

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https://serviceworke.rs/ The Service Worker Cookbook is a collection of working, practical examples of using service workers in modern web apps.

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Basically WHAT NOW?

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demo time https://pokedex.org 2015/16

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this is sorted

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but is it?

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// script.js if (navigator.serviceWorker) { navigator.serviceWorker.register('/serviceworker.js'); }

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Progressive enhancement

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We’ll fix that

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a takeaway note

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Does this make any sense?

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“ There will always be some alternative that is technologically more advanced than the web. First there were CD- ROMs. Then we had Flash. Now we have native apps.” 
 Jeremy Keith
 https://adactio.com/journal/9016

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And yet the web persists.

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Responsive Web Design Ethan Marcotte 
 http://alistapart.com/article/responsive-web-design Application Cache is A Douchebag Jake Archibald http://alistapart.com/article/application-cache-is-a- douchebag Introduction to Service Worker
 Matt Gaunt http://www.html5rocks.com/en/tutorials/service- worker/introduction/ Pokedex.org Nolan Lawson https://pokedex.org https://github.com/nolanlawson/pokedex.org My First Service Worker Jeremy Keith https://adactio.com/journal/9775 Web! What is it good for? Jeremy Keith https://adactio.com/journal/9016 Resources [email protected] http://cedmax.com @cedmax any question?