The success of an application largely depends on how easily and effectively it allows a user to interact with it. For an application to be successful, its interface should be responsive and easy-to-use. Such an interface can be designed by adding JavaScript to a Web application. You can use various predefined JavaScript libraries, such as jQuery, to make the application interactive.
The response time of an application is an important factor that impacts the user experience. You can speed up the response time of an application by implementing partial page updates using Asynchronous JavaScript and XML (AJAX).
While developing a dynamic, interactive, and rich Web application, you need to ensure that the following functionalities have been implemented:
- The UI is easy to use.
- Users get quick response for their requests.
- The application runs on all the browsers.
By using client-side scripts, the preceding functionalities can be implemented. The client-side scripts enable you to develop dynamic Web pages that can respond to the user input without interacting with a Web server. This helps in reducing the network traffic because interaction with a Web server is not required in providing a dynamic response to the user interaction. This, in turn, helps in improving the response time of a Web application because the processing happens at the client side and round-trips to the server are not required.
JavaScript is a client-side scripting language that allows you to develop dynamic, interactive, and rich Web applications. JavaScript is an easy-to-learn scripting language. Therefore, programmers are able to quickly incorporate JavaScript functionalities into a Web page. However, to develop a Web application that provides quick user interactions using JavaScript, you need to write a good amount of code because the JavaScript functions vary from browser to browser. Thus, to simplify the task of developing such Web applications with fewer lines of code, JavaScript provides various libraries, such as jQuery and jQuery UI.
