August 2021
Intermediate to advanced
510 pages
11h 2m
English
Content preview from React Cookbook
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Chapter 11. Progressive Web Applications
Progressive web applications (PWAs) are web applications that try to behave like locally installed applications. They can work offline, integrate with the native notification system, and have the ability to run long background processes, which can continue even after you leave the website. They’re called progressive because they smoothly downgrade their functionality if some feature is not available in the current browser.
This chapter focuses almost exclusively on one feature of PWAs: service workers. You will occasionally encounter the term progressive web application used to describe any JavaScript-rich browser application. The truth is that unless that application uses service workers, it isn’t a PWA.
Service workers are, in effect, a locally installed server for the application. The backend server is a software distribution mechanism and a provider of live data services, but the service worker is really in charge because it provides access to the network. It can choose to satisfy network requests from its own local cache. If the network is not available, it can choose to replace network resources with local placeholders. It can even queue data updates offline and synchronize with the backend server when the network connection reappears.
This is a good topic for the final chapter because it has been the most enjoyable chapter to write. Service workers are one of the most fascinating features found in modern browsers. We hope you have ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.