WPT
wpt / cors / request-headers.htm
Spec: Fetch ↗
Runs: Chrome 155.0.8043.0 (wpt@b89af32bc, 2026-09-05) | Firefox 157.0a1 (wpt@b89af32bc, 2026-09-05) | Safari 251 preview (wpt@b89af32bc, 2026-09-05) | Ladybird 1.0-ca509 (wpt@b89af32bc, 2026-09-05) | Servo Servo 0.6 (wpt@2c385f65e, 2026-09-04) | Blitz a50cb8971 (wpt@a95401e4e, 2026-09-03)
View on the Blitz WPT dashboard | Open test on wpt.live | wpt.fyi
| Chrome | Firefox | Safari | Ladybird | Servo | Blitz | |
|---|---|---|---|---|---|---|
| Total | 6/6 | 6/6 | 6/6 | 6/6 | 5/6 | NOT RUN |
| Subtest | Chrome | Firefox | Safari | Ladybird | Servo | Blitz |
|---|---|---|---|---|---|---|
| basic request header | PASS | PASS | PASS | PASS | PASS | — |
| Simple request headers need not be in allow-headers | PASS | PASS | PASS | PASS | PASS | — |
| Unspecified request headers are disallowed | PASS | PASS | PASS | PASS | PASS | — |
| Strange allowheaders (case insensitive) | PASS | PASS | PASS | PASS | FAIL | — |
| INVALID_STATE_ERR on setRequestHeader before open() | PASS | PASS | PASS | PASS | PASS | — |
| INVALID_STATE_ERR on setRequestHeader after send() | PASS | PASS | PASS | PASS | PASS | — |