CONSOLE WARNING: line 24: Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user's experience. For more help, check https://xhr.spec.whatwg.org/.
CONSOLE ERROR: Access to XMLHttpRequest at 'http://127.0.0.1:8000/xmlhttprequest/resources/access-control-allow-lists.php?origin=http%3A%2F%2Flocalhost%3A8000%00' from origin 'http://localhost:8000' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.


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Frame: '<!--framePath //<!--frame0-->-->'
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Check that exact matching is used when comparing a request's originating url and the value provided by Access-Control-Allow-Origin.

On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".

Should disallow origin: 'http://localhost:8000'
PASS xhr.send(null) threw exception NetworkError: Failed to execute 'send' on 'XMLHttpRequest': Failed to load 'http://127.0.0.1:8000/xmlhttprequest/resources/access-control-allow-lists.php?origin=http%3A%2F%2Flocalhost%3A8000%00'..
PASS successfullyParsed is true

TEST COMPLETE