Browse Library
Sign In Start Free Trial
Close icon Search icon
Account
Browse Library Sign In Start Free Trial

Add to playlist

Create a Playlist

Modal Close icon
You need to login to use this feature.
  • Book Overview & Buying Offline First Web Development
  • Table Of Contents Toc
Offline First Web Development

Offline First Web Development

By : Daniel Sauble
2 (1)
Buy this Book
close
close
Offline First Web Development

Offline First Web Development

2 (1)
By: Daniel Sauble
Buy this Book

Overview of this book

When building mobile apps, it’s easy to forget about the moments when your users lack a good Internet connection. Put your phone in airplane mode, open a few popular apps, and you’ll quickly see how they handle being offline. From Twitter to Pinterest to Apple Maps, some apps might handle being offline better—but very few do it well. A poor offline experience will result in frustrated users who will abandon your app, or worse, turn to your competitor’s apps Expert or novice, this book will teach you everything you need to know about designing and building a rigorous offline app experience. By putting the offline experience first, you’ll have a solid foundation to build upon, avoiding the unnecessary stress and frustration of trying to retrofit offline capabilities into your finished app. This basic principle, designing for the worst-case scenario, could save you countless hours of wasted effort.
Table of Contents (12 chapters)
close
close
close
Preface
Icon
Preface
Icon
What this book covers
Icon
What you need for this book
Icon
Who this book is for
Icon
Conventions
Icon
Reader feedback
Icon
Customer support
Lock Free Chapter
1
1. The Pain of Being Offline
Icon
1. The Pain of Being Offline
Icon
The offline paradigm
Icon
Developing for a worst-case scenario
Icon
Principles of a good offline design
Icon
Making the case to yourself
Icon
Making the case to others
Icon
Summary
2
2. Building a To-do App
Icon
2. Building a To-do App
Icon
Configuring the development tools
Icon
Configuring Sencha Touch
Icon
Creating a Git repository
Icon
Designing the offline experience
Icon
Creating a skeleton application
Icon
Building an offline to-do app
Icon
Comparing and contrasting with the design principles
Icon
Summary
3
3. Designing Online Behavior
Icon
3. Designing Online Behavior
Icon
Designing the online workflow
Icon
The online/offline transition
Icon
Adding an online data store
Icon
Implementing image support
Icon
Implementing mapping support
Icon
Comparing and contrasting with the design principles
Icon
Summary
4
4. Getting Online
Icon
4. Getting Online
Icon
Offline databases
Icon
Connecting to our Web API
Icon
Adding online-only features
Icon
Comparing and contrasting with the design principles
Icon
Summary
5
5. Be Honest about What's Happening
Icon
5. Be Honest about What's Happening
Icon
Exposing the system state to the user
Icon
Building trust through up front communication
Icon
Predicting the future
Icon
Letting users provide direction
Icon
Staying functional in bad network conditions
Icon
Comparing and contrasting with the design principles
Icon
Summary
6
6. Be Eventually Consistent
chevron up
Icon
6. Be Eventually Consistent
Icon
What is a split-brain?
Icon
Refactoring the item store
Icon
Implementing conflict detection
Icon
Implementing the conflict resolution
Icon
Comparing and contrasting with the design principles
Icon
Summary
7
7. Choosing Intelligent Defaults
Icon
7. Choosing Intelligent Defaults
Icon
Low-hanging fruit
Icon
Cache limits
Icon
List frequency
Icon
Clearing the cache
Icon
Usage scenarios
Icon
Comparing and contrasting with the design principles
Icon
Summary
8
8. Networking While Offline
Icon
8. Networking While Offline
Icon
What it means to be offline
Icon
Device support
Icon
Platform-independent libraries
Icon
Synchronization over Wi-Fi
Icon
Making the setup less painful
Icon
Summary
9
9. Testing and Measuring the UX
Icon
9. Testing and Measuring the UX
Icon
Manual testing
Icon
Testing frameworks
Icon
Before and after
Icon
Future improvements
Icon
Summary
10
A. References
Icon
A. References
Icon
Chapter 1
Icon
Chapter 2
Icon
Chapter 3
Icon
Chapter 4
Icon
Chapter 6
Icon
Chapter 7
Icon
Chapter 8
Icon
Chapter 9
11
Index
Icon
Index

Chapter 6. Be Eventually Consistent

In this chapter, we'll finally address the question of what happens when two users update the same piece of information while offline. This problem, known as split-brain, is common to all distributed systems. When the apps finally get online, which change wins? Do we resolve the conflict automatically or do we let the user decide?

Try this now. Open the app in two separate browsers. Using the mobile development tools, put each app into offline mode. Now, make changes to the same to-do item on each device and then put them online. Notice how the last change wins. This is certainly a solution to the problem, but is it the best solution? Probably not.

We can't know which change is the correct change. Maybe both the users think that their change should win or don't even consider the possibility that their change may fail. We could let the owner win by default, but this doesn't address what happens when two collaborators make changes...

Visually different images
CONTINUE READING
83
Tech Concepts
36
Programming languages
73
Tech Tools
Icon Unlimited access to the largest independent learning library in tech of over 8,000 expert-authored tech books and videos.
Icon Innovative learning tools, including AI book assistants, code context explainers, and text-to-speech.
Icon 50+ new titles added per month and exclusive early access to books as they are being written.
Offline First Web Development
End of Section 6
Next Section
notes
bookmark Notes and Bookmarks search Search in title playlist Add to playlist font-size Font size

Change the font size

margin-width Margin width

Change margin width

day-mode Day/Sepia/Night Modes

Change background colour

Close icon Search
Country selected
Close icon Your notes and bookmarks

Confirmation

Modal Close icon
claim successful
Order Page Read Now

Buy this book with your credits?

Modal Close icon
Are you sure you want to buy this book with one of your credits?
Close
YES, BUY

Submit Your Feedback

Modal Close icon
Modal Close icon
Modal Close icon