Leran JavaScripts

Ajax XMLRequest

The XMLHttpRequest object is used to request data from a server.

Send a Request To a Server

To send a request to a server, we use the open() and send() methods of the XMLHttpRequest object:

Syntax for creating an XMLHttpRequest object:

          
xhttp.open("GET", "ajax_info.txt", true);
xhttp.send();
          
        

The url - to send Request

The url parameter of the open() method, is an address to a file on a server:

           
xhttp.open("GET", "ajax_info.txt", true);
          
        

The file can be any kind of file, like .txt and .xml, or server scripting files like .php

Asynchronous - True or False?

Server requests should be sent asynchronously.
The async parameter of the open() method should be set to true:

          
xhttp.open("GET", "ajax_test.asp", true);