Final answer:
XMLHttpRequestObject in AJAX has various methods and properties. Methods like open(), send(), and setRequestHeader() are used to initialize and send requests, while properties such as onreadystatechange and readyState monitor request changes and statuses. This object enables asynchronous data interactions on the web without page refreshes.
Step-by-step explanation:
XMLHttpRequestObject Methods and Properties
The XMLHttpRequestObject is a critical component in AJAX (Asynchronous JavaScript and XML) that allows for the asynchronous sending and receiving of data on the web without needing to refresh the whole page. It offers various methods and properties to interact with server data.
Methods such as open(), which initializes a new request, and send(), which sends the request, are fundamental to its operation. Additionally, the setRequestHeader() method is used to set HTTP headers before sending a request.
Ajax also relies on important properties like onreadystatechange, which is an event handler that fires at every state change of the request, and readyState, indicating the status of the request. The status property provides HTTP status codes from the server response, while responseText or responseXML hold the response data in text or XML format, respectively.
These tools are key for developers to create dynamic user experiences on the web. Correct usage of XMLHttpRequestObject methods and properties ensures efficient data retrieval and manipulation, which is essential for modern web development.