Learn how to build progressive web apps by understanding and implementing their building blocks.

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Web development is challenging, but progressive web applications provide a significant advantage over traditional web applications by enabling capabilities such as installation to the device, offline access, and push notifications.

You’ll start by learning about PWAs and understanding the core tenets of a PWA. Next, you’ll learn to implement features like offline support, intercepting network requests, and app installation banners using service worker APIs. You’ll then progress to caching strategies for improved performance, IndexedDB for storing data locally, and background syncing for unstable networks. Finally, you’ll cover responsive web design and native-device APIs to make your PWA feel and look like a native app.

After completing this course, you can build progressive apps with engaging and responsive experiences. You’ll also be prepared to optimize your existing web apps as PWAs, extending their reach and improving performance.

Building Progressive Web Applications

Usually, the JavaScript code that we use to build web applications is single-threaded, attached to individual pages, and can be used for actions, such as:
- Manipulating the DOM of HTML pages.
- Showing alerts.
- Prompting the user for input.

# Service workers
A service worker is a web worker that runs as a background process irrespective of whether the app is running. It runs on a single thread other than the main UI thread of a web page.

A service worker is attached to any particular scope and manages all its pages. The service worker can't manipulate the DOM because it's not attached to a page.


Introduction

Understanding the App Manifest

The Service Workers

Caching Using Service Workers

Cache Strategies

Offline Image Viewer

IndexedDB

Note-Taking App

Creating App-like UI & UX

Offline Experience with Background Sync API

Web Push Notifications (Notification API, Push API)

Native Device Features

The Photo-Sharing App

Wrapping Up

What are Service Workers?

Service workers