Blog

Progressive Web Applications

Progressive Web Applications (PWA) creates an advanced platform for the latest technologies to combine the best of web and mobile apps. In this article, we look into recent advancements in the browser and the opportunities to build a new generation of web apps.

The Progressive Web Apps originally proposed by Google in 2015, have already attracted a lot of attention in web applications because of the relative ease of development and the almost instant wins for the application’s user experience by its features and applications.PWA could be the next big thing for the mobile web in the 21st century.

We are the top progressive web app development company in Hyderabad, India adopted the advanced tools and technologies to make the application fast, robust, easier to develop, understand and test. We integrate features like Server workers, push notification, offline browsing, data analysis and easy distribution channels into web apps for both desktop and mobile interface with an objective to maximize user engagement and deliver the best solution for your businesses.

What is Progressive Web Application (PWA) ?

Progressive Web Apps development (PWA) are built and enhanced with modern API (Application Program Interface) to deliver native-like capabilities, reliability, and installability of web developments which reach anyone, anywhere, on any device with a single codebase.

A progressive web applications (PWA) is a type of application software delivered through the web, built using common web technologies including HTML, CSS and JavaScript. It is intended to work on any platform that uses a standards-compliant browser.Since a progressive web applications framework is a type of webpage or website known as a web application, there is no requirement for developers or users to install the web apps via digital distribution systems like Apple App Store or Google Play.

The Three pillar of PWA:

Progressive Web Applications in Hyderabad, India are web applications that have been designed so they are capable, reliable, and installable. These three pillars transform them into an experience that feels like a native application.

1.Capable :

The web is quite capable in its own right today.Recently, only native apps could really lay claim to these capabilities. While some capabilities are still out of the web’s reach, new and upcoming APIs are looking to change that, expanding what the web can do with features like file system access, media controls, app badging, and full clipboard support. All of these capabilities are built with the web’s secure, user-centric permission model, ensuring that going to a website is never a scary proposition for users.Between modern APIs, Web Assembly, and new and upcoming APIs, Progressive web applications frameworks are more capable than ever, and those capabilities are only growing.

2.Reliable :

A reliable Progressive Web App feels fast and dependable regardless of the network.Speed is critical for getting users to use your experience. In fact, as page loading times go from 1 second to ten seconds, the probability of a user bouncing increases by 123%.Scrolling and animation should feel smooth. Performance affects your entire experience, from how users perceive your application to how it actually performs.Finally, reliable applications need to be usable regardless of network connection. Users love apps that respond to interaction in the blink of an eye, and an experience they can depend on.

3.Installable :

Installed Progressive Web Apps framework runs in a standalone window instead of a browser tab. They’re launchable from on the user’s home screen or taskbar. It’s possible to search for them on a device and jump between them with the app switcher, making them feel like part of the device they’re installed on.

When a Progressive Web App moves out of a tab and into a standalone app window, it transforms how users think about it and interact with it.

Progressive web applications in Hyderabad take advantage of the much larger web ecosystem, plugins and community and the relative ease of deploying and maintaining a website when compared to a native application in the respective app stores. Think of it as a website built using web technologies but that acts and feels like an app. For those of you who develop on both mobile and web, you’ll appreciate that a website can be built in less time, that an API does not need to be maintained with backwards-compatibility (all users will run the same version of your website’s code, unlike the version fragmentation of native apps) and that the app will generally be easier to deploy and maintain.

If web applications come with a rich user experience, push notifications, offline support and instant loading, they can conquer the world. This is what a progressive web applications development does.

A Progressive Web Application development delivers a rich user experience because it has several strengths:

1.Fast: The User Interface is not flaky so that scrolling is smooth and the app responds quickly to user interaction.

2.Reliable: A normal website forces users to wait, doing nothing, while it is busy with the server. A PWA, meanwhile, loads data instantaneously from the cache. A PWA works seamlessly, even on a 2G connection. Every network request to fetch an asset or set of data goes through a service worker which first verifies whether the response for a particular request is already in the cache. When users get real content almost instantly, even on a poor connection, they trust the app more and view it as more reliable.

3.Engaging: A PWA can earn a place on the user’s home screen. It offers native mobile apps like experience by providing a full-screen work area with flexible screen resolutions. It makes use of push notifications and offline support to keep users engaged.

Building blocks of PWA

Let us look unto the technical aspects of the Progressive Web Applications are a new set of technologies and guidelines which allow web developers to create engaging and perform web applications that can compete with native mobile apps. 

Now, we discuss the outline browser support for each of the features and show a few code snippets which make use of the APIs a little.

A) Service Workers:

Service workers are essentially a script which is created by web developers that can be installed on the user’s browser and grants access to do actions in the background.

For example, it can act as a middle tier and intercept requests to the server from clients or run background tasks to sync data from a server to update the cache, or listen to push notifications. All of this can be done when the browser isn’t open on the device, so it’s a very powerful item in your toolbox.

The most common use of a service worker is to enable offline support and to improve the speed of your site. Your service worker can be set up to intercept requests from the client to the server, check if the resource is stored in your app cache and deliver the cached resource instead of making a request to the server. This is exactly how you enable offline support on your app.

PWA in hyderabad,India - Server workers

function main ()
{
   /* navigator is a WEB API that allows scripts to register themselves and carry out their activities. */
    if (‘serviceWorker’ in navigator) 
   {
        console.log(‘Service Worker is supported in your browser’)
        /* register method takes in the path of service worker file and returns a promises, which returns the registration object */
        navigator.serviceWorker.register(‘./service-worker.js’).then (registration => 
            {
            console.log(‘Service Worker is registered!’)
            }
)
    } 
else 
{
        console.log(‘Service Worker is not supported in your browser’)
 }
}
()

B)Notifications API

The notifications API is used for creating customised notifications. The API allows you to configure settings such as the image, title, description, a prompt / CTA and much more. For a notification to work, one of the requirements is you have a Service Worker installed. A basic example would look something like this:

/* Notification.permission can have one of these three values: default, granted or denied. */
if (Notification.permission === ‘default’) {
    /* The Notification.requestPermission() method shows a notification permission prompt to the user. It returns a promise that resolves to the value of permission*/
    Notification.requestPermission().then (result => {
        if (result === ‘denied’) {
            console.log(‘Permission denied’)
            return
        }
        if (result === ‘granted’) {
            console.log(‘Permission granted’)
            /* This means the user has clicked the Allow button. We’re to get the subscription token generated by the browser and store it in our database.

            The subscription token can be fetched using the getSubscription method available on pushManager of the serviceWorkerRegistration object. If a subscription is not available, we subscribe using the subscribe method available on pushManager. The subscribe method takes in an object.
         
            serviceWorkerRegistration.pushManager.getSubscription()
                .then (subscription => {
                    if (!subscription) {
                        const applicationServerKey = ”
                        serviceWorkerRegistration.pushManager.subscribe({
                            userVisibleOnly: true, // All push notifications from server should be displayed to the user
                            applicationServerKey // VAPID Public key
                        })
                    } else {
                        saveSubscriptionInDB(subscription, userId) // A method to save subscription token in the database
                    }
                })
        }
    })
}

Progressive web app in hyderabad - notifications

C) Push API

The push API allows a service worker to listen to incoming push messages. Setting up a push notification server is an article in itself, so I won’t go over it here. But essentially, in your service worker, it’s possible to add an event listener for push events, and provide functionality to display a notification using the Notification API. 

For example:
self.addEventListener(‘push’, function(e) {
 var options = {
   body: ‘This notification was generated from a push’,
   icon: ‘images/notification.png’
 };
 e.waitUntil(
   self.registration.showNotification(‘Push notification’, options)
 );
});

The Push API has better support across modern browsers, however Apple and Microsoft are lagging behind on this one.

PWA hyderabad - Push API

Progressive Web Applications in hyderabad are progressive enhancement is a great technique for developers to use new technology while maintaining support for older browsers. While you can’t rely on these technologies working everywhere, they will give users on newer browsers a much faster and more enjoyable experience.

How PWAs are different than Native apps?

It is important to understand that progressive web apps developments have the following characteristics:

  1. Progressive: By the definition itself, a progressive web app must work on any digital media devices and enhance the web progressively, taking advantage of any features available on the user’s device and browser.
  2. Discoverable: Because a progressive web app is a website, it should be discoverable in search engines like Google, Yahoo, bing etc. This is a major advantage over native mobile applications, which still lag behind websites in searchability.
  3. LinkableAs another characteristic inherited from websites, a well-designed website should use the Uniform Resource Identifier (URI) to indicate the current state of the application. This will enable the web app to retain or reload its state when the user bookmarks or shares the app’s Uniform Resource Locator (URL).
  4. ResponsiveA progressive web app’s UI must fit the device’s form factor and screen resolution and size.
  5. Similarity: A progressive web app should look like a native mobile app and be built on the application shell model, with minimal page refreshes.
  6. Re-engageable: Mobile app users are more likely to reuse their apps and progressive web apps features are intended to achieve the same goals by providing push notifications and pop-ups.
  7. InstallableA progressive web app can be installed on the device’s home screen, making it readily available on desktop and mobile apps.
  8. Secure: Because a progressive web app has a more intimate user interface experience and because all network requests can be intercepted through service workers, it is imperative that the app is hosted over HTTPS to prevent hacking techniques and man-in-the-middle attacks.

We Conquerors technologies make Fast, Integrated, Engaging and most reliable PWA development for transforming your business ideas into excellent user interfaces to create apps that are capable of connecting with the consumers and for helping their business to achieve online goals. 

We provide a reliable Progressive Web App development services in Hyderabad with faster turnaround times and better Return on Investment(ROI). Our Progressive web app developers who are well trained and a good amount of experience in Web and Mobile app development to deliver innovative and best in class results. As a top leading progressive web app development company in India, we ensure you get services that are innovative and customized according to your requirements.

The Roadshow of Progressive Web Applications

The following Progressive Web App video series will find out how others have successfully used PWAs to improve their user experience and learn some of the key concepts behind PWAs.