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The Ultimate Progressive Web Apps Tutorial For Beginners

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Progressive web apps or PWA have grown over the years. Here’s everything about PWA so you can experience the new web technology yourself.

Vimal Tarsariya

August 2, 2022

Since Google's initial suggestion in 2015, progressive web development has recently increased. PWAs (progressive web applications) combine the finest features of mobile and web technology to deliver an excellent user experience.

In this blog, We will cover what progressive web applications are, how they function, why you should select them, common progressive web app frameworks, fundamental building pieces, important advantages, and how to create a progressive web app from scratch in this beginner's guide.

You will discover the capabilities of PWA technology and how to use it to create a website with limitless possibilities. This progressive web app tutorial from Vasundhara Infotech will help you maximize your user audience reach. 

1. What is Progressive Web Apps?

A website transformed into an application is known as a progressive web application. 

This is a browser extension with extra features, including offline functionality, push notification support, an easy-to-use interface, a response time that is on par with native applications, etc.

With all of this, PWAs are less expensive to create and maintain, but their significant benefit is that they are cross-platform. 

Since they operate straight from the browser and can appear like full-fledged programmes without an address bar in the browser, they also don't need to be published in the app stores (Google Play Store and App Store). 

2. How Do Progressive Web Apps Work?

PWA runs as a standalone window or shortcuts on Windows 10 and other operating systems or as an app icon on Android devices' and smartphones' home screens.

These apps load rapidly when opened because of the Cache API and IndexedDB, which keep the app's resources and data, allowing PWAs to work while offline.

Because of Service Workers and push notifications, PWAs may conduct background tasks such as syncing and sending notifications to users even when they are not running.

Furthermore, the Fetch APIs make PWAs run faster, and the data request process runs more smoothly.

PWAs, like regular web apps, are wholly hosted on the app's servers rather than being packaged as an offline file.

As a result, developers can do the PWA update the same way they would a web update on the server.

3. Popular Progressive Web App Frameworks in 2023


  • Vue

Vue features, despite being much newer than React and Angular, are still among the best frameworks for PWA development.

It is comparable to Angular and React in principle and is reasonably easy to use in rendering and scripting, especially for inexperienced developers.

Nonetheless, the biggest disadvantage of this framework is that it is controlled by a single person, thus the customer support staff is still limited.

  • Angular

Angular is a popular technology for creating progressive web apps. With the latest version of Angular 8, developers may skip HTML/CSS markup when creating PWAs, easily add new functionality, and save time during testing.

However, in order to use the framework, you must first master Typescript, which is not a simple task. Furthermore, this PWA framework is not SEO-friendly in general.

  • React

React is yet another excellent framework for developing progressive web apps. It has an extensive JavaScript library that allows developers to share and reuse code.

Furthermore, thanks to Virtual-DOM, the rendering process is quick.

It is, however, somewhat complicated, and you must learn about JSX. Furthermore, because there is no straightforward process, execution is challenging.

  • Ionic

The Ionic framework allows developers to build web apps using rival frameworks such as Angular, React, or Vue.

The framework also provides PWA toolkits and extensive PWA development instructions.

However, because Ionic renders graphic elements through the browser, it may delay the time full graphics display on the device's screen, resulting in poor app performance.

  • Polymer

Polymer is another intriguing option for PWA developers due to its numerous tools, components, and templates.

It is a standalone framework that uses only HTML, CSS, or JavaScript and fully supports routing, data tiers, responsive layouts, and so on.

The Polymer framework has the disadvantage of not being SEO-friendly and is slightly slower than other frameworks in terms of reloading time.

4. What Are the Basic Building Blocks of PWAs?

To make your site a legitimate PWA, you must fulfil the three fundamentals:

  • A service worker

A service worker is an essential element of PWAs that allows you to tap into network requests and generate smoother online experiences. It also allows you to selectively cache portions of your site to provide a better offline experience.

  • The manifest file

PWAs point to the manifest file, which contains information about how your PWA appears and functions, such as the app name, description, icons, authors, and so on.

  • A secure connection (HTTPS)

To make PWAs perform efficiently, you must serve them via a secure connection to assure user security and confidence.

5. Best Example of Progressive Web Apps

PWA technology competes with native frameworks because users do not want to invest time or storage space in app installation.

They will continue to utilize the mobile-friendly website if it functions properly.

  • BMW

BMW's progressive web app was designed to give a plethora of articles, podcasts, and tales with a stylish design that represents the automaker's style.

On a smartphone, the user can swipe through immersive information provided in 'loops,' where the selection appears to never end.

More automobile consumers became interested in looking for their future BMW as a result of a well-planned PWA reading experience.

After PWA launch

  • The number of new users climbed by 50%.
  • Pages loaded four times faster on average
  • Four times more individuals visited BMW sales pages.
  • New SEO optimization increased site traffic by 49%
  • Adidas

Adidas' store was marked as underperforming in a 2018 study of the Top 1000 websites in the UK. The next year, the brand launched a PWA front to reach mobile users who did not have their app.

Their new digital strategy stressed faster user registration via pop-ups at the beginning of the shopping process. Adidas' launch year was one of the most successful in recent memory.

After PWA launch

  • In 2018, the year of the PWA's introduction, global revenue climbed by 36%.
  • First Contentful Paint took only 2.1 seconds
  • In 2021, net income from continuing activities increased by 223% year on year.
  • Trivago

Subscriptions are difficult for booing sites because users are mainly interested in quickly comparing hotel prices. This behaviour stifled Trivago's mobile expansion.

The company opted to create a progressive web application in the hopes that user engagement would increase if the platform used as little data as possible.

However, the distribution was done in stages, with offline functionality coming first, followed by push notifications and the "add to home screen" capability. Trivago only delivered a comprehensive PWA when their team observed encouraging results.

After PWA launch

  • 97% increase in hotel search results page clicks.
  • 150% increased user engagement
  • 67% of disconnected users continue browsing after reconnecting

6. PWA Tutorial: How To Build a Progressive Web App from Scratch

Step 1

Create an HTML page to serve as the application's starting point. This HTML will include a link to the manifest.json file. This is a critical file that will be created in the following stage.

Step 2

In the same directory, create a manifest.json file. This file primarily contains data about the web application. The programme name, starting URL, theme colour, and icons are all examples of essential information.

The JSON format specifies all of the necessary information.

Step 3

Make a new folder called images and set all of the application's icons. The picture name and dimensions should be the same as those in the manifest file. It is recommended that the icon sizes be at least 192 by 192 pixels and 512 by 512 pixels.

Step 4

Using a live server, serve the directory to make all files available.

Step 5

In Chrome, open the index.html file and go to the Application Section in the Chrome Developer Tools. From the list, select the manifest column.

Step 6

The installability page will state that service workers have yet to be discovered. In the same directory, we'll need to create another file for the PWA, serviceworker.js.

This file contains the configuration for a service worker, which will manage the application's operation.

Step 7

Finally, connect the service worker file to index.html. This is accomplished by adding a small JavaScript script to the index.html file prepared in the preceding steps. Insert the following code into index.html's script tag

Installing the application
  • When we go to the Service Worker tab, we can see that the service worker has been successfully registered, and we can now install our app because there is an install option available.
  • To install the application, click the install button. Following installation, the application would appear on the desktop.
  • The Add to Home screen option in the mobile browser can be used to install the application on a mobile device. The application will then be installed on the gadget.

7. Key Benefits of Progressive Web Apps


  • Low prices

PWAs are equally useful as mobile apps, yet they are far less expensive to produce. It is more difficult to persuade a user to instal an app than to visit a website. As a result, it is the ideal alternative for generating a high ROI.

  • Excellent SEO integration

Not only because of the limited volume of data, but also due to storage and cost considerations. Implementing a PWA can help supplement an existing web marketing strategy. PWAs load and index quickly, resulting in an excellent user experience.

  • No updates are required

For automated updates, native apps require manual upgrading or a continual Wi-Fi connection. PWA does not require any background updates before launch, nor does it require Play Store approval.

  • More URL possibilities

You can share links directly on the website, something mobile applications do not allow.

  • Low data usage

PWAs are more "lightweight" since they use smaller data. They only demand a little memory, which results in the optimum performance on a mobile device.

  • Excellent business outcomes

Low data usage and quick downloads ensure a smooth experience. Conversion rates can be significantly boosted. When users spend more time and money on the company's devoted solution, the company becomes more successful and profitable.

A progressive web app provides considerable functionality while using no hardware resources. This is required for modern websites to deliver an interface that resembles the native user experience.

8. Why Choose Progressive Web Apps

A user must first locate an app in an app store, then download and install it. The last step is to launch the app. According to one study, the application loses roughly 20% of its users for each step between the user's initial interaction with the app and the user's first use of the app.

When a user discovers your progressive web app, they will be able to utilize it right away. One thing to note is that PWAs do not have any unnecessary installation or downloading processes.

When users return to the app, they will be prompted to install it and upgrade to a full-screen experience.

However, utilizing a native app isn't all that horrible. Users are more likely to reopen a mobile application than a website. It is vital to note that mobile apps with push notifications have three times the retention of their counterparts without the push.

Furthermore, because some resources are stored on the device, a well-designed mobile app consumes less data and operates significantly faster.

Progressive web applications benefit from having the characteristics of mobile apps, which leads to enhanced performance and eliminates the issues associated with mobile app maintenance.

Final Notes

PWA is an integrated solution with a lot to offer companies. It has no setup or base fees, and its dependability, quick download times, and offline functionality enhance user experience and boost conversion rates.

The PWA development necessitates a hands-on approach. And if you are only beginning your journey but already want to utilize all the advantages of cutting-edge technology, get in touch with us.

At Vasundhara Infotech, a leading website development company, our team is prepared to give creative ways to boost your company's profitability because we have experience developing PWAs for various sectors.

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Vimal Tarsariya

Project Manager at Vasundhara Infotech, a leading software development company. His great planning and execution qualities led to several successful projects.

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