Book Image

Progressive Web Application Development by Example

By : Chris Love
Book Image

Progressive Web Application Development by Example

By: Chris Love

Overview of this book

Are you a developer that wants to create truly cross-platform user experiences with a minimal footprint, free of store restrictions and features customers want? Then you need to get to grips with Progressive Web Applications (PWAs), a perfect amalgamation of web and mobile applications with a blazing-fast response time. Progressive Web Application Development by Example helps you explore concepts of the PWA development by enabling you to develop three projects, starting with a 2048 game. In this game, you will review parts of a web manifest file and understand how a browser uses properties to define the home screen experience. You will then move on to learning how to develop and use a podcast client and be introduced to service workers. The application will demonstrate how service workers are registered and updated. In addition to this, you will review a caching API so that you have a firm understanding of how to use the cache within a service worker, and you'll discover core caching strategies and how to code them within a service worker. Finally, you will study how to build a tickets application, wherein you’ll apply advanced service worker techniques, such as cache invalidation. Also, you'll learn about tools you can use to validate your applications and scaffold them for quality and consistency. By the end of the book, you will have walked through browser developer tools, node modules, and online tools for creating high-quality PWAs.
Table of Contents (12 chapters)

Service Worker Caching Patterns

The internet is great, until you are offline or have poor connectivity. Then it becomes an act of futility as you wait for a page to load that never seems to materialize. Eventually, the request times out and the browser displays a message letting you know you're offline—Chrome is known for its cute offline dinosaur.

Most web traffic comes from smartphones, and many of those connections are made over a cellular connection (GPRS). Cellular networks are great when they work, but often a clean connection to the internet is not guaranteed.

Even in the United States, reliable LTE networks are not ubiquitous. There are several locations near my house where I have no cell coverage. Imagine what it might be like in a less developed area.

This is where service workers and the Cache API can help you out. The combination of these two features enables...