jQuery is the most popular online library designed purposely to promote the usage of JavaScript to develop several web based and desktop based applications. It is licensed under GNU and MIT, hence it is an open source application.

The best part of jQuery is that it supports cross browser compatibility. By using a Generic Handler, you can easily insert a record in the database. Compared to other programming, a simple modification is required and you get an instant result.

In addition to that, one of the most important and popular uses of jQuery is to make a Data Model in Visual Studio. Since Windows also accepts jQuery, it is far much easier for programmers to make javascript applications for platforms like AJAX.