1. Deepak D. Upadhyay
160511201754
MCA-4
A new way to deliver amazing user experiences on the web.
Progressive Web App (PWA)

2.  Production Use Case of PWD
 Flipkart Lite
 Housing
 Conclusion
 Description
 Introduction
 Features of PWA
 Principles of PWA
 Web App Manifest
 Add to Home Screen Banner
 Service Workers
 Push Notifications
Overview

3. Web development has evolved significantly over the years allowing
developers to deploy a website or web application and serve millions of
people around the globe within minutes. With just a browser, a user can
put in a URL and access a web application. With, Progressive Web
Apps, developers can deliver amazing app-like experiences to users
using modern web technologies.
Description

4.  A progressive web application is basically a website built using modern web
technologies but acts and feels like a mobile app.
 In 2015, Alex Russell, Google engineer, and Frances Berriman coined the
term Progressive Web Apps.
 Google has been immensely working on making sure that progressive web
apps can really give users that native-app like experience.
Introduction

5.  The flow of a typical progressive web app goes thus:
 Starts out as accessible in tabs on the Web browser
 Shows the option of adding to the home screen of the device
 Progressively starts exhibiting app-like properties such as offline usage, push
notifications and background sync
Introduction

6.  Progressive: Work for every user, regardless of browser choice
because they’re built with progressive enhancement as a core.
 Responsive: Fit any form factor, desktop, mobile, tablet, or whatever
is next.
 Connectivity independent: Enhanced with service workers to work
offline or on low quality networks.
Features of Progressive Web App

7.  App-like: Use the app-shell model to provide app-style navigations
and interactions.
 Fresh: Always up-to-date thanks to the service worker update
process.
 Safe: Served via TLS to prevent snooping and ensure content hasn’t
been tampered with.
Features of Progressive Web App

8.  Discoverable: Are identifiable as “applications” thanks to W3C
manifests and service worker registration scope allowing search
engines to find them.
 Re-engageable: Make re-engagement easy through features like
push notifications.
 Installable: Allow users to “keep” apps they find most useful on their
home screen without the hassle of an app store.
Features of Progressive Web App

9. Principles of Progressive Web App
1.Web App
Manifest
2.Add to
Home Screen
Banner
4.Push
Notification
3.Service
Workers

10.  The Manifest for Web applications is a simple JSON file that gives
you, the developer, the ability to control how your app appears to
the user in the areas that they would expect to see apps (for
example the device home screen), direct what the user can launch
and more importantly how they can launch it.
 The manifest enables your web app to have a more native-like
1.Web App Manifest

11.  It allows the app to be launched in full-screen mode, provides
control over the screen orientation and in recent versions of Chrome
on Android supports defining a Splash Screen and theme color for
the address bar.
 It is also used to define a set of icons by size and density used for
the aforementioned Splash screen and home screen icon.
1.Web App Manifest

12. 1.Web App Manifest

13.  Chrome on Android has support adding in your site to the home
screen for a while now, but recent versions also support proactively
suggesting sites be added using native Web App install banners.
2.Add to Home Screen Banner

14.  In order for the app install prompts to display your app must:
 A valid Web App manifest
 Served over HTTPS
 A valid service worker registered
 Be visited twice, with at least 5 minutes between visits
2.Add to Home Screen Banner

15. 2.Add to Home Screen Banner

16.  A service worker is a script that runs in the background, separate
from your web page.
 It responds to events, including network requests made from pages
it serves. A service worker has an intentionally short lifetime.
3.Service Workers for Offline Caching

17.  Service workers are powerful for offline caching but they also offer
significant performance wins in the form of instant loading for repeat
visits to your site or web app.
 You can cache your application shell so it works offline and populate
its content using JavaScript.
3.Service Workers for Offline Caching

18. 3.Service Workers for Offline Catching

19.  Push notifications allow your users to opt-in to timely updates from
sites they love and allow you to effectively reengage them with
customized, engaging content.
4.Push Notification For Re-Engagement

20. 4.Push Notification For Re-Engagement

21.  Several developers and companies have re-developed their websites
into progressive web apps.
 I'll give a summary of three significant products that are progressive
web apps and the benefits they have accrued over time.
Production Use Case of PWA

22.  3x less data usage
 40% higher re-
engagement rate
 Users spend more time
on the platform
 70% conversion rate
Flipkart Lite

23.  40% lower bounce rate
 10% longer average
session
 30% faster page load
Housing

24.  I will be able to cover basics of how progressive web apps work
in general.
 Building a high-quality Progressive Web App has incredible
benefits, making it easy to delight your users, grow
engagement and increase conversions.
Conclusion

25. Questions & Discussion