The optional property usernameFragment
in the RTCIceCandidateInit
dictionary specifies the value of the RTCIceCandidate
object's usernameFragment
property.
Value
A DOMString
containing the username fragment (usually referred to in shorthand as "ufrag" or "ice-ufrag") that, along with the ICE password ("ice-pwd"), uniquely identifies a single ongoing ICE interaction, including for any communication with the STUN server. The string may be up to 256 characters long, and has no default value.
Randomization
At least 24 bits of the text in the ufrag
are required to be randomly selected by the ICE layer at the beginning of the ICE session. The specifics for which bits are random and what the remainder of the ufrag
text are are left up to the browser implementation to decide. For example, a browser might choose to always use a 24-character ufrag
in which bit 4 of each character is randomly selected between 0 and 1. Another example: it might take a user-defined string and append three 8-bit random bytes to the end. Or perhaps every character is entirely random.
Example
...
Specifications
Specification | Status | Comment |
---|---|---|
WebRTC 1.0: Real-time Communication Between Browsers The definition of 'RTCIceCandidateInit.usernameFragment' in that specification. |
Candidate Recommendation | Initial specification. |
Browser compatibility
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
usernameFragment | Chrome Full support Yes | Edge Full support ≤18 | Firefox Full support 67 | IE No support No | Opera Full support Yes | Safari ? | WebView Android Full support Yes | Chrome Android Full support Yes | Firefox Android Full support 67 | Opera Android Full support Yes | Safari iOS ? | Samsung Internet Android Full support Yes |
Legend
- Full support
- Full support
- No support
- No support
- Compatibility unknown
- Compatibility unknown