The errorDetail read-only property of the RTCError interface is a string indicating the WebRTC-specific error code that occurred.
A read-only string whose value indicates the type of WebRTC-specific error that occurred on an RTCPeerConnection. The possible values are:
data-channel-failureThe connection's RTCDataChannel has failed.
dtls-failureThe negotiation of the DTLS connection failed, or the connection was terminated with a fatal error. The error's message contains details about the nature of the error. If a fatal error is received, the error object's receivedAlert property is set to the value of the DTLS alert received. If, on the other hand, a fatal error was sent, the sentAlert property is set to the alert's value.
fingerprint-failureThe remote certificate for the RTCDtlsTransport didn't match any of the fingerprints listed in the SDP. If the remote peer can't match the local certificate against the provided fingerprints, this error doesn't occur, though this situation may result instead in a dtls-failure error.
hardware-encoder-errorThe hardware encoder doesn't support the given configuration parameters.
hardware-encoder-not-availableThe hardware encoder resources required to accomplish the requested operation aren't available.
sctp-failureThe SCTP negotiation has failed, or the connection has terminated with a fatal error. The SCTP cause code can be found in the RTCError object's sctpCauseCode property. SCTP error cause codes 1-13 are defined in the SCTP specification: RFC 4960, section 3.3.10.
sdp-syntax-errorThe SDP syntax is invalid. The error's sdpLineNumber property indicates the SDP message line number where the error was detected.