1. Introducing Progressive Web Apps

A Progressive Web App (PWA) is a web app that leverages special browser capabilities that enable the app to act more like a native or mobile app when running on capable browsers. That’s it, that’s all that needs to be said—the rest of this book is all about showing you how to build them (with lots of code examples, of course).

Developers build PWAs primarily using two technologies available in most modern browsers: web app manifest files and service workers. Chapter 2, “Web App Manifest Files,” tells you pretty much everything you need to know about web app manifest files. The remaining chapters cover service workers and what you can do with them.

There’s no standard or standards body for PWAs; a PWA is just ...

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