Server response status (200, 404, ...) on synchronous page load?

Question

JavaScript

How to use javascript to find out the status of the server response (200, 404, ...) during the initial synchronous page load? Those. XMLHttpRequest does not exist in this case.

Answer 1

On the server side, you know the status. Pass it to javascript.
In PHP:
echo '<script type="text/javascript">var status='.$status.';</script>';

Answer 2

If you received a response from the server 200, 404, ... during the initial synchronous download, then the javascript code could not get into the client browser and cannot be executed.
If it is still necessary, pay attention to the scripts embedded in the browser, but where is the guarantee that all your visitors will install this plugin?

Answer 3

You can request the same page again via XMLHttpRequest.
In general, some strange task, I would like to answer that you should not need it :-)

Answer 4

httpRequest.status - https://developer.mozilla.org/en/AJAX/Getting_Started .