<script> | |
fetch("http://example.test:8000/xmlhttprequest/resources/access-control-allow-lists.php?origin=*", {method: "POST"}) | |
.then(() => { | |
window.opener.postMessage('FAIL: Fetch API succeeded unexpectedly', '*'); | |
}, e => { | |
window.opener.postMessage('DONE', '*'); | |
}); | |
</script> |