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WPT

wpt / webrtc / RTCPeerConnection-addTrack.https.html

Spec: WebRTC ↗

Runs: Chrome 155.0.8039.0 (wpt@6ec9fd59f, 2026-09-03) | Firefox 157.0a1 (wpt@6ec9fd59f, 2026-09-03) | Safari 251 preview (wpt@5ce815a83, 2026-08-27) | Ladybird 1.0-795e1 (wpt@7e3d005d7, 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

ChromeFirefoxSafariLadybirdServoBlitz
Total12/1212/1212/120/120/12NOT RUN
SubtestChromeFirefoxSafariLadybirdServoBlitz
addTrack when pc is closed should throw InvalidStateErrorPASSPASSPASSFAILFAIL—
addTrack with single track argument and no stream should succeedPASSPASSPASSFAILFAIL—
addTrack with single track argument and single stream should succeedPASSPASSPASSFAILFAIL—
addTrack with single track argument and multiple streams should succeedPASSPASSPASSFAILFAIL—
Adding the same track multiple times should throw InvalidAccessErrorPASSPASSPASSFAILFAIL—
addTrack with existing sender with null track, same kind, and recvonly direction should reuse senderPASSPASSPASSFAILFAIL—
addTrack with existing sender that has not been used to send should reuse the senderPASSPASSPASSFAILFAIL—
addTrack with existing sender that has been used to send should create new senderPASSPASSPASSFAILFAIL—
addTrack with existing sender with null track, different kind, and recvonly direction should create new senderPASSPASSPASSFAILFAIL—
Adding more tracks does not generate more candidates if bundledPASSPASSPASSFAILFAIL—
Calling addTrack while sRD(offer) is pending should allow the new remote transceiver to be the same one that addTrack createsPASSPASSPASSFAILFAIL—
When addTrack is called while sRD is in progress, and both addTrack and sRD add a transceiver of different media types, the addTrack transceiver should come first, and then the sRD transceiver.PASSPASSPASSFAILFAIL—