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E-raamat: Building Progressive Web Apps: Bringing the Power of Native to the Browser

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  • Formaat: 288 pages
  • Ilmumisaeg: 08-Aug-2017
  • Kirjastus: O'Reilly Media
  • Keel: eng
  • ISBN-13: 9781491961605
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Building Progressive Web Apps: Bringing the Power of Native to the BrowserSuurem pilt
  • Formaat: 288 pages
  • Ilmumisaeg: 08-Aug-2017
  • Kirjastus: O'Reilly Media
  • Keel: eng
  • ISBN-13: 9781491961605
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Move over native apps. New progressive web apps have capabilities that will soon make you obsolete. With this hands-on guide, web developers and business execs will learn howand whyto develop web apps that take advantage of features that have so far been exclusive to native apps. Features that include fast load times, push notifications, offline access, homescreen shortcuts, and an entirely app-like experience.

By leveraging the latest browser APIs, progressive web apps combine all of the benefits of native apps, while avoiding their issues. Throughout the book, author Tal Ater shows you how to improve a simple website for the fictional Gotham Imperial Hotel into a modern progressive web app. Plus:

Understand how service workers work, and use them to create sites that launch in an instant, regardless of the users internet connection Create full-screen web apps that launch from the phone's homescreen just like native apps Re-engage users with push notifications, even days after they have left your site Embrace offline-first and build web apps that gracefully handle loss of connectivity Explore new UX opportunities and challenges presented by progressive web apps
Preface xi
1 Introducing Progressive Web Apps 1(10)
The Web Strikes Back
2(1)
The Current Mobile Landscape
3(2)
The Progressive Web App Advantage
5(2)
The Tab, the Web, and the Service Worker
7(4)
2 Your First Service Worker 11(18)
Setting Up Our Sample Project
11(2)
Welcome to the Gotham Imperial Hotel
13(1)
Getting to Know the Code
14(1)
The Current Offline Experience
15(2)
Creating Your First Service Worker
17(4)
What Is Progressive Enhancement?
21(1)
HTTPS and Service Workers
21(1)
Fetching Content from the Web
22(2)
Capturing Offline Requests
24(1)
Creating HTML Responses
25(2)
Understanding Service Worker Scope
27(1)
Summary
28(1)
3 The CacheStorage API 29(12)
What CacheStorage Is and, More Importantly, What It Is Not
30(1)
Deciding When to Cache
31(1)
Storing Requests in CacheStorage
32(1)
Retrieving Requests from CacheStorage
33(1)
Caching in Our Sample App
34(2)
Matching the Right Response to Each Request
36(2)
HTTP Caching and HTTP Headers
38(1)
Summary
39(2)
4 Service Worker Lifecycle and Cache Management 41(22)
The Service Worker Lifecycle
44(3)
The Service Worker Lifetime and the Importance of waitUntil
47(1)
Updating a Service Worker
48(2)
Why We Need to Manage the Cache
50(3)
Cache Management and Clearing Old Caches
53(4)
Reusing Cached Responses
57(2)
Configuring the Server to Serve the Right Caching Headers
59(1)
Developer Tools
59(3)
The Console
59(1)
Have You Tried Turning It Off and On Again?
60(1)
Inspect CacheStorage and IndexedDB
60(1)
Network Throttling and Simulating Offline Conditions
61(1)
Lighthouse
61(1)
Summary
62(1)
5 Embracing Offline-First 63(30)
What Is Offline-First?
64(2)
Common Caching Patterns
66(3)
Mix and Match: Creating New Patterns
69(3)
Planning Our Caching Strategy
72(2)
Implementing Our Caching Strategy
74(10)
Application Shell Architecture
84(4)
Including Content in the Initial Render
86(2)
Implementing App Shell
88(2)
Achievement Unlocked
90(1)
Summary
91(2)
6 Storing Data locally with IndexedDB 93(42)
What Is IndexedDB
94(3)
Using IndexedDB
97(16)
Opening a Database Connection
97(1)
Database Versioning/Modifying an Object Store
98(1)
Adding Data to an Object Store
99(2)
Reading Data from an Object Store
101(1)
IndexedDB Version Management
102(2)
Reading Objects With a Cursor
104(2)
Creating Indices
106(2)
Reading Data Using an Index
108(1)
Limiting a Cursor's Range
108(1)
Setting a Cursor's Direction
109(1)
Updating Objects in an Object Store
110(2)
Deleting Objects from an Object Store
112(1)
Deleting All Objects from an Object Store
112(1)
Handling Bubbling IndexedDB Errors
113(1)
IndexedDB for SQL Ninjas
113(2)
IndexedDB in Practice
115(8)
The Database That Was Promised
123(6)
IndexedDB Housekeeping
129(1)
Using IndexedDB in the Service Worker
130(1)
The IndexedDB Ecosystem
131(2)
PouchDB
132(1)
localForage
132(1)
Dexie.js
133(1)
IndexedDB Promised
133(1)
Summary
133(2)
7 Ensuring Offline Functionality with Background Sync 135(22)
How Background Sync Works
137(2)
The SyncManager
139(4)
Accessing SyncManager
139(1)
Registering Events
140(1)
Sync Events
140(1)
Event Tags
141(1)
Getting a List of Registered Sync Events
141(1)
Last Chances
142(1)
Passing Data to the Sync Event
143(5)
Maintaining an Action Queue in IndexedDB
143(2)
Maintaining a Queue of Requests in IndexedDB
145(2)
Passing Data in the Sync Event Tag
147(1)
Adding Background Sync to Our App
148(7)
Summary
155(2)
8 Service Worker to Page Communication with Post Messages 157(16)
Window to Service Worker Messaging
158(2)
Service Worker to All Open Windows Messaging
160(1)
Service Worker to Specific Window Messaging
161(2)
Keeping the Line of Communication Open with a MessageChannel
163(3)
Communicating Between Windows
166(3)
Posting Messages from a Sync Event to the Page
169(2)
Summary
171(2)
9 Grabbing Homescreen Real Estate with Installable Web Apps 173(10)
Installable Web Apps
174(1)
How Browsers Decide When to Show an App Install Banner
175(1)
Anatomy of a Web App Manifest
176(5)
Backwards, Sideways, and Future Compatibility
181(1)
Summary
182(1)
10 Reach Out with Push Notifications 183(36)
Life of a Pushed Notification
183(4)
The Notification API
184(1)
The Push API
184(2)
Push + Notification
186(1)
Creating Notifications
187(10)
Requesting Permission for Notifications
187(3)
Showing Notifications
190(5)
Adding Notification Support to Gotham Imperial Hotel
195(2)
Subscribing a User to Push Events
197(9)
Generating Public and Private VAPID Keys
199(1)
Generating a GCM key
200(2)
Creating a New Subscription
202(2)
Subscribing Gotham Imperial Hotel Users to Push Messages
204(2)
Sending Push Events from the Server
206(3)
Listening for Push Events and Showing Notifications
209(8)
Interrogating Notifications
215(2)
Summary
217(2)
11 Progressive Web App UX 219(20)
Grace and Trust
219(1)
Communicating State from the Service Worker
220(2)
Communicating with Progressive UI KITT
222(3)
Common Messages in Progressive Web Apps
225(2)
Caching Complete
225(1)
Page Cached
226(1)
Action Failed But Will Complete When User Regains Connectivity
226(1)
Notifications Enabled
227(1)
Choosing the Right Words
227(1)
Always Be Closing
227(4)
Progressive Web App Design
231(2)
Your Design Should Reflect Changing Conditions
231(1)
Your Design Should Fit Its Environment
232(1)
Your Design Should Adapt to the Particularities of Each Medium
232(1)
Your Design Should Instill Confidence and Inform the User
233(1)
Your Design Should Help the User and Your Business Achieve Their Goals
233(1)
Taking Charge of the Install Prompt
233(2)
Measuring and Aiming for Performance with RAIL
235(2)
Summary
237(2)
12 What's Next for PWAs 239(12)
Accepting Payments with the Payment Request API
239(2)
User Management with the Credential Management API
241(1)
Real-Time Graphics with WebGL
242(2)
Futuristic APIs with Speech Recognition
244(1)
Virtual Reality in the Browser with WebVR
245(1)
Easy Sharing to and from Your App
245(1)
Slick Media Playing UIs
246(2)
The Next Great Era
248(3)
A Service Workers: A Great Opportunity to Adopt ES2015 251(4)
B Full-Page Interstitials or: How I Learned to Hate the Door Slam 255(2)
C CORS Versus NO-CORS 257(2)
Index 259
Tal Ater is a developer, consultant and entrepreneur with over 20 years of experience. His experience includes both client, server and product development, and managing R&D and product departments. He is very passionate and involved with the open source community. His open source contributions, including his popular Service Worker and Speech Recognition libraries, are used by millions of people every day. He has written and spoken extensively on web development, product development, security and open source. His work and research has been extensively featured in the media, including Forbes, The New York Times and the BBC, making his mother very proud.
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