Newly Available
Performance
id: event-timing
Event timing
The
event and first-input performance entries and the PerformanceEventTiming API measures the latency of user input events, such as mouse clicks or keypresses. They're used to calculate Interaction to Next Paint (INP), a common metric for perceived responsiveness.
Baseline Status:
Achieved Newly Available on Dec 12, 2025 across core engines.
Desktop Browser Engine Support
Google Chrome
76
Supported
Mozilla Firefox
89
Supported
Apple Safari
26.2
Supported
Microsoft Edge
79
Supported
Mobile Browser Engine Support
Chrome Android
76
Firefox Android
89
Safari iOS
26.2
Specifications and References
MDN Browser Compat Data Keys:
api.EventCounts ↗
api.EventCounts.@@iterator ↗
api.EventCounts.entries ↗
api.EventCounts.forEach ↗
api.EventCounts.get ↗
api.EventCounts.has ↗
api.EventCounts.keys ↗
api.EventCounts.size ↗
api.EventCounts.values ↗
api.Performance.eventCounts ↗
api.PerformanceEventTiming ↗
api.PerformanceEventTiming.cancelable ↗
api.PerformanceEventTiming.interactionId ↗
api.PerformanceEventTiming.processingEnd ↗
api.PerformanceEventTiming.processingStart ↗
api.PerformanceEventTiming.target ↗
api.PerformanceEventTiming.toJSON ↗