*Summary:* PerformanceEventTiming.interactionId is a property that returns
an ID uniquely identifying a user interaction and all associated events. It
helps measure how long interactions take, identify slow events, and improve
web page responsiveness. It is used to calculate the "Interaction to Next
Paint" (INP) metric, which is part of Core Web Vitals.

*Bug:* https://bugzilla.mozilla.org/show_bug.cgi?id=1937572

*Specification:*
https://w3c.github.io/event-timing/#sec-computing-interactionid
*Standards Body:* W3C
*Platform coverage:* All
*Preference:* dom.performance.event_timing.enable_interactionid
*Link to standards-positions discussion:*
https://github.com/mozilla/standards-positions/issues/1069

*Other browsers:*
* Blink: Shipped since version 96
* WebKit: Considering (
https://github.com/WebKit/standards-positions/issues/420)

*web-platform-tests:*
https://wpt.fyi/results/event-timing?label=master&label=experimental&aligned&q=interactionid

Best,
Nazım Can

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