Offline First – Made Simple!

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Offline First, Made Easy! Gregor Martynus / @gr2m / #offlinefirst

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image: plane

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Oh, you're not from here?

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Don't make assumptions on anything beyond your user's device.

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Our offline experiences suck! ... and we should do something about it

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Good news, everyone: We can build web apps that work offline today. Plus it's easy. Gregor from Team @HoodieHQ

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Hi, I'm Gregor.

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I'm a both-end Developer & UX Designer

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I've created minutes.io – Offline First since 2011

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Initiator at Hoodie, an Open Source Architecture to build Offline First apps (and to stop worrying about the backend).

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Talk to me: @gr2m Talk to us: @hoodiehq Discuss #offlinefirst

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"Unlike the always-wired machines of the past, computers are now mobile and truly personal, and people move through online and offline seamlessly."

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"Our apps should do the same." Commons sense.

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Our Problem is ...

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We live in a bubble.

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We have been there before.

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"More often than not, the mobile experience for a Web application or site is designed and built after the PC version is complete." Luke Wroblewski (2009)

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1. Mobile is exploding

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1. Mobile is exploding 2. Mobile forces you to focus

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1. Mobile is exploding 2. Mobile forces you to focus 3. Mobile extends your capabilities

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Offline First It's not a feature. It's a mindset.

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How to build Offline First?

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Steps for Offline First 1. Separate Apps From Data 2. Deliver App Code 3. Save Data Offline 4. Detect Connectivity 5. Sync Data

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Separate Apps from Data If you build JavaScript Apps today, you are there already. Backbone, Ember, Angular ... are your friends.

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Deliver App Code And make it cacheable. Use appCache* today, ServiceWorkers tomorrow. *appCache is a Douchbag

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CACHE MANIFEST # 2010-06-18:v2 # Explicitly cached 'master entries'. CACHE: /favicon.ico index.html stylesheet.css images/logo.png scripts/main.js # Resources that require the user to be online. NETWORK: * # offline.html will be served if search is inaccessible # offline.jpg will be served in place of all images in images/large/ FALLBACK: /search /offline.html images/large/ images/offline.jpg # MUST READ: http://alistapart.com/article/application-cache-is-a-douchebag

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Sava Data Offline localStorage, IndexedDB, Wrapper of your choice

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Detect Connectivity navigator.onLine, anyone?

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Sync Data This is hard. Don't even think about inventing your own protocol. Build upon existing solutions.

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Offline First is hard.

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Everything is hard before it is easy 1 Johann Wolfgang von Goethe

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Offline First, Made Easy?

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// store an object hoodie.store.add('todo', {name: 'get the sun screen'})

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// store an object hoodie.store.add('todo', {name: 'get the sun screen'}) // create an account hoodie.account.signUp('[email protected]', 'secret')

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// store an object hoodie.store.add('todo', {name: 'get the sun screen'}) // create an account hoodie.account.signUp('[email protected]', 'secret') // send an email hoodie.email.send( emailProperties ) // events hoodie.store.on('change', handleObjectChange) hoodie.account.on('signin', handleSignIn) hoodie.on('disconnected', handleConnectionError)

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Hoodie Architecture

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Example hoodie.email.send(properties)

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Offline First extends your capabilities. Now come the good parts

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Conversion?

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Scaling? You barely know someone is using your app.

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Latency? Zero.

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Save? All the time.

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Server down? What do I care?

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Backend? Swappable commodity.

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Offline First is an ongoing discussion

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Recap

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Our Offline Experiences SUCK we have to do something about it.

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Offline First is hard. if you need sync.

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Take it easy use Hoodie <3

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Questions? iOS/Android? Conflicts? Security? Administration? Hosting? Backbone/Ember/Angular? Production ready? Plugins? ...?

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Offline First, Made Easy! Gregor Martynus / @gr2m / #offlinefirst Slides: go.hood.ie/jsonfbr-offlinefirst

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Credits 4 CatDog 4 London tube station escalator 4 The Origin of Internet Cats