WPT
wpt / webtransport / headers.https.any.worker.html
Spec: WebTransport ↗
Runs: Chrome 155.0.8039.0 (wpt@508cc6a62, 2026-09-03) | Firefox 157.0a1 (wpt@508cc6a62, 2026-09-03) | Safari 251 preview (wpt@5ce815a83, 2026-08-27) | Ladybird 1.0-56c61 (wpt@8fdda8ce4, 2026-09-03) | Servo Servo 0.6 (wpt@09159dcb3, 2026-09-02) | Blitz 188486089 (wpt@a95401e4e, 2026-09-02)
View on the Blitz WPT dashboard | Open test on wpt.live | wpt.fyi
| Chrome | Firefox | Safari | Ladybird | Servo | Blitz | |
|---|---|---|---|---|---|---|
| Total | 21/21 | 1/21 | 0/21 | 0/21 | 0/21 | NOT RUN |
| Subtest | Chrome | Firefox | Safari | Ladybird | Servo | Blitz |
|---|---|---|---|---|---|---|
| responseHeaders is null before the connection is established | PASS | FAIL | FAIL | FAIL | FAIL | — |
| responseHeaders is a Headers object after ready resolves | PASS | FAIL | FAIL | FAIL | FAIL | — |
| responseHeaders exposes server-sent response headers | PASS | FAIL | FAIL | FAIL | FAIL | — |
| wt-protocol is stripped from responseHeaders | PASS | FAIL | FAIL | FAIL | FAIL | — |
| Set-Cookie is stripped from responseHeaders | PASS | FAIL | FAIL | FAIL | FAIL | — |
| headers option forwards a custom header to the server, lowercased | PASS | FAIL | FAIL | FAIL | FAIL | — |
| Forbidden request-header names are silently dropped from the headers option | PASS | FAIL | FAIL | FAIL | FAIL | — |
| wt-available-protocols header throws TypeError | PASS | FAIL | FAIL | FAIL | FAIL | — |
| wt-available-protocols header throws TypeError (upper case) | PASS | FAIL | FAIL | FAIL | FAIL | — |
| wt-available-protocols header throws TypeError (mixed case) | PASS | FAIL | FAIL | FAIL | FAIL | — |
| HeadersInit sequence-of-sequences form is accepted | — | — | FAIL | — | — | — |
| Duplicate header names in sequence form are accepted | — | — | FAIL | — | FAIL | — |
| HeadersInit sequence with wrong inner length throws TypeError | — | — | FAIL | — | — | — |
| responseHeaders is immutable | PASS | FAIL | — | FAIL | FAIL | — |
| Invalid header name throws TypeError | PASS | FAIL | — | FAIL | FAIL | — |
| Header value containing CR/LF throws TypeError | PASS | FAIL | — | FAIL | FAIL | — |
| HeadersInit sequence-of-sequences form sends every header | PASS | FAIL | — | FAIL | FAIL | — |
| HeadersInit Headers object form sends every header | PASS | FAIL | — | FAIL | FAIL | — |
| HeadersInit sequence with an empty inner sequence throws TypeError | PASS | FAIL | — | FAIL | FAIL | — |
| HeadersInit sequence with one inner element throws TypeError | PASS | FAIL | — | FAIL | FAIL | — |
| HeadersInit sequence with three inner elements throws TypeError | PASS | FAIL | — | FAIL | FAIL | — |
| An empty headers object is accepted | PASS | PASS | — | FAIL | — | — |
| Duplicate header names in sequence form are all sent, in order | PASS | FAIL | — | FAIL | — | — |
| Header names differing only in case are lowercased and both sent | PASS | FAIL | — | FAIL | — | — |