Web Application

A web application or web app is a client–server computer program which the client (including the user interface and client-side logic) runs in a web browser. Common web applications include webmail, online retail sales, online auctions, wikis, instant messaging services and many other functions.

The general distinction between a dynamic web page of any kind and a “web application” is unclear. Web sites most likely to be referred to as “web applications” are those which have similar functionality to a desktop software application, or to a mobile app. HTML5 introduced explicit language support for making applications that are loaded as web pages, but can store data locally and continue to function while offline.

Single-page applications are more application-like because they reject the more typical web paradigm of moving between distinct pages with different URLs. Single-page frameworks like Sencha Touch and AngularJS might be used to speed development of such a web app for a mobile platform.

Mobile web applications

There are several ways of targeting mobile devices when making a web application:

Responsive web design can be used to make a web application – whether a conventional web site or a single-page application viewable on small screens and work well with touchscreens.
Progressive Web Apps are a hybrid of regular web pages (or websites) and a mobile application.
Native apps or “mobile apps” run directly on a mobile device, just as a conventional software application runs directly on a desktop computer, without a web browser (and potentially without the need for Internet connectivity); these are typically written in Java (for Android devices) or Objective-C or Swift (for iOS devices). Recently, frameworks like React Native, Flutter and Xamarin allow the development of native apps for all platforms using languages other than each standard native language.
Hybrid apps embed a mobile web site inside a native app, possibly using a hybrid framework like Apache Cordova and Ionic or Appcelerator Titanium. This allows development using web technologies (and possibly directly copying code from an existing mobile web site) while also retaining certain advantages of native apps (e.g. direct access to device hardware, offline operation, app store visibility).

Detailed Explanation

A web application or web app is a client–server computer program in which the client (including the user interface and client-side logic) runs in a web browser. Common web applications include webmail, online retail sales, online auctions, wikis, instant messaging services and many other functions.

Web sites most likely to be referred to as “web applications” are those which have similar functionality to a desktop software application, or to a mobile app. HTML5 introduced explicit language support for making applications that are loaded as web pages, but can store data locally and continue to function while offline.

Web applications can be considered as a specific variant of client–server software where the client software is downloaded to the client machine when visiting the relevant web page, using standard procedures such as HTTP. Client web software updates may happen each time the web page is visited. During the session, the web browser interprets and displays the pages, and acts as the universal client for any web application.

Applications are usually broken into logical chunks called “tiers”, where every tier is assigned a role. Web applications lend themselves to an n-tiered approach by nature with the most common structure is the three-tiered application. A web browser is the first tier (presentation), an engine using some dynamic Web content technology (such as ASP, CGI, ColdFusion, Dart, JSP/Java, Node.js, PHP, Python or Ruby on Rails) is the middle tier (application logic), and a database is the third tier (storage). The web browser sends requests to the middle tier, which services them by making queries and updates against the database and generates a user interface.

Apply for Govt certification on Web Application

https://www.vskills.in/certification/web-development

IT Professionals, Web Developers, Web Programmers, IT students can Apply for the certification course to move ahead in their careers.