What is AJAX?
AJAX means for Asynchronous JavaScript And XML. It is not a programming language itself but it is used as a combination of JavaScript and XML and HTML. In short, it is the use of the XMLHttpRequest object to interact with servers. It can transmit and accept data in many forms, along with XML, JSON, HTML, and text files.
It is a new technology or mechanism for building improved, faster and interactive Web Applications. These web applications are created with the help of HTML, CSS, JavaScript and XML.
An end user can carry on the use of web application while the client program requests information access from the server in the background.
A browser built-in XMLHttpRequest object is used to request information from a web server while JavaScript and HTML DOM are used to display or use the information.
As the name implies AJAX works asynchronously. It granted web pages to be updated asynchronously by transferring information with a web server behind the backgrounds. This denotes that without reloading the whole page, we can update any part of a web page There is no need to reload whole page.
Now there is a question about Ajax that it is a front-development or back-end development?
Ajax is a front-end development or technique that is used to communicate with the database server (back-end). All AJAX program is written in JavaScript, and the interrelated handler program goes in your back-end execution, this code or program could be in any language.
Ajax is moderately being changed to work with JavaScript frameworks and the official Fetch API Standard, to create interactive websites and latest web standards.
You need to do four things to, use AJAX in JavaScript:
AJAX framework: -
An Ajax framework is a multi browser support framework or technology that offers developers to create excellent internet applications with the use of Ajax.
AJAX components or Technologies: -
AJAX is mainly depends on Internet Standards. Main components of AJAX are as follows:
AJAX Features: -
The main attribute of AJAX is to create web-pages faster, AJAX permits to load only important section of web-page without reloading the whole website or web-page.
Advantages of AJAX: -
The first and main advantage of Ajax is its capacity to enhance or upgrade the performance and accessibility of web applications by providing easy user interfaces.
Disadvantages of Ajax: -
Difference between AJAX model and Normal Technique:
AJAX Model: | Normal Technique: |
- The browser creates a javacript call to activate XMLHttpRequest - In the background the browser sends an HTTP request to the server - The server receives, retrieves and delivers data back to the browser - Consequently the browser receives data from the server and immediately displays it on the frontend without reloading the whole page. | - HTTP is send from the browser to the server - The server receives and then retrieves the information - Next, the server sends the requested data back to the browser - Finally, the browser gets the data and reloads the page to display the data |
Difference between AJAX and JQuery:
AJAX: | JQuery: |
- Complexity: a powerful tool - Page reload: no - Function: a combination of serval other technologies such as CSS, JS, HTML and DOM providing a lot of new functions - Accessibility: ajax should be resolved in the proper procedural manner to receive data from the server - Server overload: this occurs regulary due to the rise in the number of connections each time ajax calls happen. | - Complexity: a lightweight library primarily aims at the interaction of html elements - Page reload: yes - Function: unable to provide new functions by combining other technologies - Accessibility: accessible through the frontend - Server overload: rarely |
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