Which method is used to initialize an HTTP request in an AJAX transaction?

The initialization of an HTTP request in an AJAX transaction is performed using the open() method. This method configures the request by specifying the request method (such as GET or POST), the URL to which the request is being sent, and whether the request should be asynchronous or not. By calling open(), you are essentially preparing the request to be sent later using the send() method.

The open() method is critical in the AJAX lifecycle because it sets up the necessary parameters that define how the request will function, including the type of request, the endpoint, and other optional settings. This step must be completed before any actual data is sent to the server or responses are awaited.

Using the incorrect options as a reference, while the send() method does send the request after it has been initialized, it does not configure or prepare the request itself. The get() method is not a standard method in the XMLHttpRequest API, and init() is not a recognized method in this context, making them unsuitable for this purpose.