Progressive Web App Architecture: Key Concepts

Progressive Web App Architecture: Key Concepts

To maintain a business and safeguard it so that it constantly moves on a path which leads it forward, a jillion of methods and technologies are practiced. Businesses always have an interrogation to be responded; whether or not to switch their trade to mobile apps.

In this era of science, to build an app, there are various options available to choose from such as a native app, cross-platform app, hybrid or progressive web app (PWA). To improve the overall experience of your clientele, one should shift to PWA technology.

Progressive web applications have a rather unique architecture which enables them to have the glimpse and finish of a native app without getting installed or downloaded from the application store.

Like any other app, progressive web applications also have many architectural peripherals. In this write-up, you will adept enough to the basics of architectural components and the concept of progressive web app architecture. For the comfort of our readers, we have branched the entire piece.

Introduction to Progressive Web App Architecture

Introduction to Progressive Web App Architecture

A progressive web app can be termed as a website that resembles and operates as a mobile application. The idea behind building the PWA Architecture is to combine the maximal benefits provided by Server-side and Client-side rendering.

In short, the objective of the progressive web app is to remove the difference between the web and native app. it can be said that progressive web apps constitute well-to-do performance and the polished user experience linked to the native apps.

To realize the factual usefulness of PWAs, one can simply consider the case that according to various statistics, it is currently believed that almost 50% of the mobile applications will be PWAs, by the year 2020. These web mobile apps have various attributes like responsiveness, progressiveness, independence, connectivity, safe, fresh, discoverable, installable, linkable, re-engageable. All these features of PWA make it more popular among the businesses.

To pick up more about this notion, you can also look at a few of the finest progressive web app architectures’ examples. In the following part, the spotlight of this article will shift to the technical components conjoined to progressive web applications.

Technical Components

Technical Components

Businesses planning to turnabout to PWAs, always confront a situation of how to implement the functionality of such apps to manage it with perfection. The quick fix to this situation is the division of the whole app into four technical components. It plays a major role in supporting the elements of PWA.

  • Web-app manifest
  • Service Workers
  • Application Shell
  • Transport Layer Security

The Web-App Manifest

The Web-App Manifest

The Web-App manifest which is a JSON file is the foremost component responsible for the appearance of the PWA. This JSON file aids the PWA to give a look of a native app. Through the usage of this component, a developer frames the bond of the front-end with the back-end of the app. With this, a developer can regulate the manner of PWA to be exhibited to all users.

A web-app manifest is further a bundle of various sub-branches including a starting URL, the short application name, the full application name, icon-size, icon link, location, and types. With the support of this technical component, a developer can specify a splash screen and theme color of the address bar.

The Service Workers

The Service Workers

The second technical component is the Service Worker. It is a JavaScript file which runs independently. It does not have any dependency on a web app or a web page. The features of PWA supported by this component are push notifications, offline work mode, background syncs, and so on.

It is also liable to respond to every user interaction within the app. This also includes all network requests which are made from web pages to its servers. Since this component executes the processes of short term event, the lifespan of it is also less.

The Application Shell

Application Shell, the third technical component is specialized to split the static and dynamic content of the app. This component ensures a very important way to the progressive web app development. This component also allows the PWA to execute without any sort of connection. The core design elements of this component make it capable to perform such function.

This component drives especially for applications which are heavily based on JavaScript and consist of a relatively stable navigation system on a single page with changing content.

The Transport Layer Security (TLS)

The fourth component is the Transport Layer Security. It is important for the readers to note that

All PWAs support the Transport Layer Security (TLS) protocol.

This protocol is also the standard for all robust and secure data exchange which might take place between any two applications. For the data integrity and security, one must serve the website with HTTPS and further SSL certificate installation on any provided server.

These are all the major technical components which are associated with a progressive web application. Readers can also refer to a progressive web app diagram which may help them in understanding this topic in more detail. It is also important for the readers to know that better functionality or quality of app corresponds to a higher conversion rate. According to statistics, a high-quality progressive web application can increase the conversion rate by 4 times!



In this last section, we will be looking at the procedure which is followed by the user whenever they access a progressive web application.

  • Whenever a visitor access the webpage, the basic HTML, JavaScript and CSS content loads.
  • Then, the webpage registers the service worker instance and triggers the “Install” event.
  • After installation, the navigation control of the website is handed over to the service worker.
  • To colonize the view, a request is sent to the content by the web app.

A similar process is followed every time when a request is made.


Introducing PWA to your business can resolve many problems. But, before implementation, it is always good to get a brief idea about which technical requirements you are going to invest in your system. We hope this article has provided you a proper explanation of the Technical components and working of PWA.

If you are looking for a PWA that follows a stepwise architectural procedure and takes the user experience offered by your company to an entirely new level then we at Newizze have just the right solution for you. With the help of our technical expertise and integrated solutions, we can ensure that you get the best progressive web application.

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