| CONSOLE WARNING: line 18: 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: line 35: Access to XMLHttpRequest at 'http://localhost:8000/xmlhttprequest/xmlhttprequest-sync-vs-async-assertion-failure.html' from origin 'http://127.0.0.1:8000' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. |
| Test for: |
| |
| bug 40996: Progress event should not be fired during synchronous XMLHttpRequest; |
| bug 17502: Assertion failure when trying to restart a sync XMLHttpRequest as an async one from onreadystatechange. |
| Step 1: Same origin request |
| readystatechange 4 |
| load |
| loadend |
| |
| Step 2: Cross origin request, disallowed |
| NetworkError: Failed to execute 'send' on 'XMLHttpRequest': Failed to load 'http://localhost:8000/xmlhttprequest/xmlhttprequest-sync-vs-async-assertion-failure.html'. |
| |
| Step 3: Cross origin request, allowed |
| readystatechange 4 |
| load |
| loadend |
| |
| Step 4: Cross origin request, check that preflight isn't attempted |
| readystatechange 4 |
| load |
| loadend |
| |
