RTCIceCandidatePairStats: writable property

Deprecated: This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.

Non-standard: This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

The obsolete RTCIceCandidatePairStats property writable reports whether or not the connection described by the candidate pair is writable.


A Boolean value which is true if the connection described by this candidate pair has received acknowledgement of receipt (ACK) for at least one ICE request and that STUN consent hasn't expired.

Note: This property was removed from the specification in early 2017 because you can determine whether or not an incoming ICE request is available to read by checking to see if responsesReceived is greater than 0 and that the time specified by consentExpiredTimestamp has not passed:

if (
  icpStats.responsesReceived > 0 &&
  icpStats.consentExpiredTimestamp < performance.now()
) {
  /* at least one ICE response has been received */

Browser compatibility

BCD tables only load in the browser