7 Steps Of AJAX Operation in Web World

Posted By : Sagar Singhal | 31-Jan-2019

Introduction Of AJAX -:

AJAX stands for Asynchronous JavaScript and XML. It is a  modern technique for creating better, faster and more interactive web applications with the help of XML, HTML, CSS, and JavaScript. AJAX used many components like, it uses XHTML for content, CSS for presentation, along with the Document Object Model and JavaScript for dynamic content display.This is basically a web browser technology independent of web server software. This commonly used as the format for receiving server data, although any format, including plain text, can be used. It is not a programming language or a tool, but a concept. In short, Ajax is a client-side script that communicates to and from a server/database without the need for a postback or a complete page refresh. 

AJAX is Based on Open Standards - :

AJAX is based on following open standards - 
1. Browser-based presentation with the help of  HTML and Cascading Style Sheets (CSS).
2. Data gets stored in XML format, fetched from server.
3. Data is fetches using XMLHttpRequest objects in the browser behind-the-scenes.
4. JavaScript to make everything happen. 

Some Other Tools for Designing -:

JAVASCRIPT -
1. Loosely typed scripting language.
2. The javascript function is called when an event occurs on the page.
3. Glue for the whole Ajax operation.

DOM -
1. API for accessing and manipulating structured documents.
2. This helps to Represents the structure of XML and HTML documents.
 
CSS - 
This allows for a clear separation of the presentation style from the content and may be changed programmatically by JavaScript.


Some Steps Of AJAX Operation -:


1. A client event occurs.
2. An XMLHttpRequest object is created.
3. The XMLHttpRequest object is configured.
4. The XMLHttpRequest objects make an asynchronous request to the Web server.
5. The Web server returns the result containing XML.
6. The XMLHttpRequest calls the callback() function and processes the result.
7. The HTML DOM is Updated.

Benefits of AJAX -:


1.Callbacks: Ajax is used to perform a callback, making a quick round trip to and from the server to retrieve and/or save data without posting the entire page back to the server. By not performing a full postback and sending all data to the server, network utilization is minimized and quicker operations occur. In sites and locations with restricted bandwidth, this helps to improve network performance. Most of the time, the data being sent to and from the server is negotiable. With the help of callbacks, the server is not required to process all form elements. Due to sending only the necessary data, there is limited processing on the server. So no need to process all form elements, process the ViewState, send images back to the client, or send a full page back to the client.


2. Making Asynchronous Calls: This Concept allows you to make asynchronous calls to a web server. Through this,  It helps the client browser to avoid waiting for all data to arrive before allowing the user to act once more.?


3. User-Friendly: Due to page postback is being eliminated, Ajax-enabled applications will always be more responsive, faster and more user-friendly.


4. Faster: The main purpose of Ajax is to improve the speed, performance, and usability of a web application. Let's take an Example of Ajax is the movie rating feature on Netflix. The user rates a movie and these will be saved to their database without waiting for the page to refresh or reload. These ratings are being saved to their database without posting the entire page back to the server.

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