Offline Sync for Progressive Web Apps at IBM Think

With the introduction of progressive web apps and browser APIs like persistent storage, payments, geolocation and push notifications, it's now possible to build full-featured mobile apps on the web platform. One important aspect of progressive web apps is the concept of building your app to be "offline-first." With an offline-first approach, you first design your app for the most resource-constrained environment. This approach provides a consistent user experience whether the user’s device has no connectivity, limited connectivity or great connectivity. One of the biggest benefits of offline-first apps is that they can be very fast, as they provide zero-latency access to content and data stored directly on the device.

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1. Think 2018 / March 19, 2018 / © 2018 IBM Corporation Offline Sync for Progressive Web Apps — Bradley Holt Developer Advocate Senior Software Engineer
3. Web or mobile app? IBM Cloud / March 6, 2018 / © 2018 IBM Corporation iPhone 4 - Bottom View with Bumper by William Hook, on Flickr <https://flic.kr/p/8e7p2s> (CC BY-SA 2.0).
4. http://gph.is/2dhW35c
5. Progressive Web Apps IBM Cloud / March 6, 2018 / © 2018 IBM Corporation Provides both the discoverability of a web app and the reliable, fast, and engaging user experience of a native mobile app
6. https://www.pwastats.com/
7. https://developers.google.com/web/showcase/2017/twitter
8. Pokedex.org IBM Cloud / March 6, 2018 / © 2018 IBM Corporation An offline-capable Progressive Web App built with Service Worker and PouchDB https://www.pokedex.org/
10. Not just offline… IBM Cloud / March 6, 2018 / © 2018 IBM Corporation Accès wi-fi à Gorakshep (5140m) by Jerome Bon, on Flickr <https://flic.kr/p/bDzjj5> (CC BY 2.0).
11. Reliable, fast, and engaging user experience— regardless of network connectivity IBM Cloud / March 6, 2018 / © 2018 IBM Corporation Static Wallpaper by James Spinks, on Flickr <https://flic.kr/p/2b1JP> (CC BY-SA 2.0).
12. Zero-latency access to content & data IBM Cloud / March 6, 2018 / © 2018 IBM Corporation speed 3 by Monkieyes, on Flickr <https://flic.kr/p/PXPwK> (CC BY 2.0).
13. IBM Cloud / March 6, 2018 / © 2018 IBM Corporation Offline, Online & ¯\_(ツ)_/¯ underground by weckgeschnappt_, on Flickr <https://flic.kr/p/8bkWFK> (CC BY 2.0).
14. The next billion people on the internet IBM Cloud / March 6, 2018 / © 2018 IBM Corporation the galaxy by tommy@chau, on Flickr <https://flic.kr/p/sbEHMt> (CC BY 2.0).
15. Geolocation API Network Information API IndexedDB WebRTC API Push API Notifications API Device Orientation API Screen Orientation API Permissions API Proximity API Pointer Lock API Vibration API Payment Request API Battery Status API Ambient Light Sensor API Service Worker API IBM Design Icons by International Business Machines Corporation <https://www.ibm.com/design/language/resources/icon-library/> (CC BY 4.0).
16. Service Workers IBM Cloud / March 6, 2018 / © 2018 IBM Corporation Service Workers allow for fine- grained control over caching of content and assets, enabling cache-first web apps Service Workers fetch diagram by Mozilla Contributors <https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API/Using_Service_Workers> (CC-BY-SA 2.5).
17. https://caniuse.com/#feat=serviceworkers
18. Registering a service worker example by Mozilla Contributors <https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API/Using_Service_Workers> (CC-BY-SA 2.5).
19. Install and activate a service worker example by Mozilla Contributors <https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API/Using_Service_Workers> (CC-BY-SA 2.5).
20. Custom service worker response example by Mozilla Contributors <https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API/Using_Service_Workers> (CC-BY-SA 2.5).
21. IndexedDB IBM Cloud / March 6, 2018 / © 2018 IBM Corporation IndexedDB enables app data to be stored locally within a browser IBM Design Icons by International Business Machines Corporation <https://www.ibm.com/design/language/resources/icon-library/> (CC BY 4.0).
22. https://caniuse.com/#search=indexdb
23. localForage IBM Cloud / March 6, 2018 / © 2018 IBM Corporation localForage is a polyfill that wraps IndexedDB, WebSQL, or localStorage, providing a consistent API regardless of which storage mechanism is supported by the end user’s browser IBM Design Icons by International Business Machines Corporation <https://www.ibm.com/design/language/resources/icon-library/> (CC BY 4.0).
24. https://github.com/localForage/localForage
25. Sync is Hard Technological devices designed by D3Images / Freepik <http://www.freepik.com/>. IBM Cloud / March 6, 2018 / © 2018 IBM Corporation
27. Apache CouchDB PouchDB IBM Cloudant
28. “CouchDB’s superpower is sync. Sometimes I even try to explain it to people by saying, ‘CouchDB isn’t a database; it’s a sync engine.’ It’s a way of efficiently transferring data from one place to another, while intelligently managing conflicts and revisions. It’s very similar to Git. When I make that analogy, the light bulb often goes off.” Nolan Lawson PouchDB & CouchDB: An interview with Nolan Lawson IBM Cloud / March 6, 2018 / © 2018 IBM Corporation https://blog.couchdb.org/2017/04/04/pouchdb-couchdb-an-interview-with-nolan-lawson/
29. Offline Sync for Progressive Web Apps PouchDB Devices by Darwin Laganzon, on Pixabay <https://pixabay.com/photo-1917227/> (CC0 Public Domain). | Cloud by Raphael Silva, on Pixabay <https://pixabay.com/photo-2109664/> (CC0 Public Domain). IBM Cloudant
30. https://pouchdb.com/
31. IBM Cloud / March 6, 2018 / © 2018 IBM Corporation Multi-User Apps with Hoodie http://hood.ie/
33. Devices by Darwin Laganzon, on Pixabay <https://pixabay.com/photo-1917227/> (CC0 Public Domain). | Cloud by Raphael Silva, on Pixabay <https://pixabay.com/photo-2109664/> (CC0 Public Domain). IBM Cloudant PouchDB
34. Cloudant Envoy
36. Shopping List IBM Cloud / March 6, 2018 / © 2018 IBM Corporation A series of demo Progressive Web Apps, hybrid mobile apps, native mobile apps, and a desktop app— each built using a different stack https://ibm-watson-data-lab.github.io/shopping-list-demo
37. https://github.com/ibm-watson-data-lab/shopping-list
38. Join the Offline First community IBM Cloud / March 6, 2018 / © 2018 IBM Corporation
39. Offline Camp IBM Cloud / March 6, 2018 / © 2018 IBM Corporation We are building an Offline First community, one campfire at a time. Offline Camp has visited the Catskills of New York, the Central Coast of California, Berlin, and Oregon.
40. IBM Cloud / March 6, 2018 / © 2018 IBM Corporation offlinefirst.org/chat
42. https://medium.com/offline-camp
43. Notices and disclaimers Think 2018 / March 19, 2018 / © 2018 IBM Corporation © 2018 International Business Machines Corporation. No part of this document may be reproduced or transmitted in any form without written permission from IBM. U.S. Government Users Restricted Rights — use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM. Information in these presentations (including information relating to products that have not yet been announced by IBM) has been reviewed for accuracy as of the date of initial publication and could include unintentional technical or typographical errors. IBM shall have no responsibility to update this information. This document is distributed “as is” without any warranty, either express or implied. In no event, shall IBM be liable for any damage arising from the use of this information, including but not limited to, loss of data, business interruption, loss of profit or loss of opportunity. IBM products and services are warranted per the terms and conditions of the agreements under which they are provided. IBM products are manufactured from new parts or new and used parts. In some cases, a product may not be new and may have been previously installed. Regardless, our warranty terms apply.” Any statements regarding IBM's future direction, intent or product plans are subject to change or withdrawal without notice. Performance data contained herein was generally obtained in a controlled, isolated environments. Customer examples are presented as illustrations of how those customers have used IBM products and the results they may have achieved. Actual performance, cost, savings or other results in other operating environments may vary. References in this document to IBM products, programs, or services does not imply that IBM intends to make such products, programs or services available in all countries in which IBM operates or does business. Workshops, sessions and associated materials may have been prepared by independent session speakers, and do not necessarily reflect the views of IBM. All materials and discussions are provided for informational purposes only, and are neither intended to, nor shall constitute legal or other guidance or advice to any individual participant or their specific situation. It is the customer’s responsibility to insure its own compliance with legal requirements and to obtain advice of competent legal counsel as to the identification and interpretation of any relevant laws and regulatory requirements that may affect the customer’s business and any actions the customer may need to take to comply with such laws. IBM does not provide legal advice or represent or warrant that its services or products will ensure that the customer follows any law.
44. Notices and disclaimers continued Think 2018 / March 19, 2018 / © 2018 IBM Corporation Information concerning non-IBM products was obtained from the suppliers of those products, their published announcements or other publicly available sources. IBM has not tested those products about this publication and cannot confirm the accuracy of performance, compatibility or any other claims related to non-IBM products. Questions on the capabilities of non-IBM products should be addressed to the suppliers of those products. IBM does not warrant the quality of any third-party products, or the ability of any such third-party products to interoperate with IBM’s products. IBM expressly disclaims all warranties, expressed or implied, including but not limited to, the implied warranties of merchantability and fitness for a purpose. The provision of the information contained herein is not intended to, and does not, grant any right or license under any IBM patents, copyrights, trademarks or other intellectual property right. IBM, the IBM logo, ibm.com and [names of other referenced IBM products and services used in the presentation] are trademarks of International Business Machines Corporation, registered in many jurisdictions worldwide. Other product and service names might be trademarks of IBM or other companies. A current list of IBM trademarks is available on the Web at "Copyright and trademark information" at: www.ibm.com/legal/copytrade.shtml. .
45. Thank you Think 2018 / March 19, 2018 / © 2018 IBM Corporation Bradley Holt Developer Advocate Senior Software Engineer — ibm.com
46. Think 2018 / March 19, 2018 / © 2018 IBM Corporation