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

## Background

A situation arises in providing offline availability to the user with the help of caching when the user is offline, and we don't have the requested asset in the cached form. In this scenario, the user will see the network error, "This site can't be reached," because the network request will fail offline.

A straightforward workaround is to add a `catch()` block to the `fetch` method to handle any errors.

# Background

A situation arises in providing offline availability to the user with the help of caching when the user is offline, and we don't have the requested asset in the cached form. In this scenario, the user will see the network error, "This site can't be reached," because the network request will fail offline.

A straightforward workaround is to add a `catch()` block to the `fetch` method to handle any errors.

Learn how to show a custom fallback page to the user when the app fails to fetch the requested asset.

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

The Offline-Fallback Page

Background