Introduction to AJAX


AJAX is a technology that updates parts of a web page without reloading the entire page.

What is AJAX?

AJAX = Asynchronous JavaScript and XML.

AJAX is a technology for creating fast, dynamic web pages.

AJAX allows web pages to be updated asynchronously by exchanging a small amount of data with the server in the background. This means that parts of a web page can be updated without reloading the entire page.

Traditional web pages (not using AJAX) must reload the entire page if the content needs to be updated.

There are many examples of applications that use AJAX: Google Maps, Gmail, Youtube and Facebook.

How AJAX works

ajax.gif

AJAX is based on Internet standards

AJAX is based on Internet standards and uses the following combination of technologies ：

  • XMLHttpRequest object (asynchronous data interaction with the server)

  • JavaScript/DOM (display/retrieve information)

  • CSS (setting the style of data)

  • XML (commonly used as a format for data transmission)

lamp.gifAJAX App is browser and platform agnostic!

Google Suggest

AJAX became popular with the release of Google’s search suggestion feature in 2005.

Google Suggest uses AJAX to create a highly dynamic web interface: when you type in Google's search box, JavaScript will send the characters to the server, and the server will return suggestions. list.

Start using AJAX today

In our ASP tutorial, we will demonstrate how AJAX can update certain parts of a web page without reloading the entire page. We will use ASP to write the server script.

If you want to learn more about AJAX, visit our AJAX tutorial.