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---
title: "RTCIceParameters: usernameFragment property"
short-title: usernameFragment
slug: Web/API/RTCIceParameters/usernameFragment
page-type: web-api-instance-property
browser-compat: api.RTCIceParameters.usernameFragment
---
{{APIRef("WebRTC")}}
The **{{domxref("RTCIceParameters")}}** dictionary's
**`usernameFragment`** property specifies the username fragment
("ufrag") that uniquely identifies the corresponding ICE session for the duration of the
current ICE session.
## Value
A string containing the username fragment that, in tandem with the
{{domxref("RTCIceParameters.password", "password")}}, uniquely identify the ICE session
being used by the transport. The string may be up to 256 characters long.
See {{domxref("RTCIceCandidate.usernameFragment")}} to learn more about username
fragments and their role in a connection.
## Specifications
{{Specifications}}
## Browser compatibility
{{Compat}}