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Progressive Web Apps

Learn how to create progressive web applications from scratch.

Tamas Piros

A PWA is a web application that can be used on any device, under any network condition. There are certain traits that applications have, but web applications do not. Throughout the book we'll take a look at how to add app like features to web apps in order to make them work offline, perform under any network connection and become re-engeagable.

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About

About

About the Book

This book is about creating Progressive Web Applications and it walks you through a journey. We start by laying down the foundations of PWAs and the core technology that enables them to exist at the first place. Throughout the book we will be building an application that will become better and better with added, progressive enhancements that include features for installation, server-side rendering and HTML streaming, and 100% offline availability. Each step is going to introduce you to a new concept, eventually allowing you to become familiar with every single aspect of PWAs. Throughout the book we will explore how to manage images for progressive web applications taking user experience into consideration as well.

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License

Creative Commons Attribution-ShareAlike 4.0 International License

Author

About the Author

Tamas Piros

Tamas is a Developer Evangelist and Google Developer Expert in Web Technologies with a significant technical training and curriculum development background. He has more than a decade of experience working and delivering trainings for large, prestigious organisations.

Throughout his career, Tamas has delivered training classes all over the world to both technical and non-technical audiences. He regularly conducts presentations and workshops at prestigious conferences and meetups on a global scale.

Contents

Table of Contents

Introduction

“Progressive”

Service Worker

Life-cycle of a Service Worker

Cache

Offline Capabilities

Listing Files

Adding Files to the Cache

Serving Files from Cache/Network

Creating an Application

Creating the Foundations

Adding Data Via REST

Think Offline-first

Caching Strategies

Stale-While-Revalidate

Cache First

Network First

Network & Cache Only

Choose the Right Caching Strategy

Workbox

Introduction to Workbox

Caching Strategies in Workbox

Cache Management with Workbox

Building the Service Worker

Streaming HTML

Refactor to Server-Side Rendering

Progressive Enhancements

"Read Later"

Visual Cues

Installation

manifest.json

Custom Installation Prompt

Notifications

VAPID

Implementing Notifications

Backend Implementation

Frontend implementation

The Coming Age of the Visual Web

Why Cloudinary?

Media and Progressive Web Applications

Adding Images to the Cache

Adaptive Image Loading

Testing & Validating PWAs (Lighthouse)

“Dynamic” Progressive Web Apps

Native Mobile Features

The Future of PWAs

Debugging Tips

Conclusion

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