Chapter 1, Learning Service Worker Basics, covers setting up the service worker in your environment, and how to get up and running using service worker development. This chapter includes registering a service worker and debugging.

Chapter 2, Working with Resource Files, provides several recipes on how to handle resource files with the service worker, including loading CSS and fonts.

Chapter 3, Accessing Offline Content, takes a look at how to cache resources and serve content offline.

Chapter 4, Accessing Offline Content with Advanced Techniques, explores advanced techniques, including templating and Google Analytics, when working with offline content.

Chapter 5, Reaching Beyond the Offline Cache, provides recipes beyond the offline cache and explores topics ranging from getting network responses offline to how to use the service worker as a load balancer.

Chapter 6, Working with Advanced Libraries, talks about Google Analytics, circuit breakers, and dead letter queues.

Chapter 7, Fetching Resources, covers various techniques on fetching resources from different sources.

Chapter 8, Experimenting with Web Push, talks about different ways of implementing push notifications.

Chapter 9, Looking at General Usage, provides various recipes on general usages of the service worker from slow responses to a live flowchart.

Chapter 10, Improving Performance, talks about how to optimize your service worker application to perform efficiently and in a performant manner.

This book was written using a Mac with Google Chrome as the browser, running Node.js. However, Node.js can be run on a Windows or Linux machine as well, along with Google Chrome.

All the software used in this book is free and open source. You will definitely need to be running Node.js and Google Chrome for most of the recipes.

In this book, you will find a number of styles of text that distinguish between different kinds of information. Here are some examples of these styles, and an explanation of their meaning.

Code words in text, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: "The skipWaiting() method is used inside the active event handler, which in turn uses Clients.claim()."

A block of code is set as follows:

self.oninstall = function(event) {
  event.waitUntil(
    fetch(zipURL)
      .then(function(res) {
        return res.arrayBuffer();
      })
      .then(getZipFileReader)
      .then(cacheFileContents)
      .then(self.skipWaiting.bind(self))
  );
};

Any command-line input or output is written as follows:

$ git add –all
$ git commit -m "initial commit"
$ git push -u origin master

New terms and important words are shown in bold. Words that you see on the screen, in menus or dialog boxes, for example, appear in the text like this: "Finally, in the sidebar on the left-hand side, select Credentials."

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To send us general feedback, simply e-mail <[email protected]>, and mention the book's title in the subject of your message.

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