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.
Status
Limited availability
MDN documentation
Specifications
- Event Timing API, from Web Performance Working Group (W3C).
Browser support
- Chrome 76 Released on 2019-07-30
- Chrome Android 76 Released on 2019-07-30
- Edge 79 Released on 2020-01-15
- Firefox 89 Released on 2021-06-01
- Firefox for Android 89 Released on 2021-06-01
- Safari ❌ Vendor position : unknown (concerns: duplication, interoperability)
- Safari on iOS ❌ Vendor position : unknown (concerns: duplication, interoperability)
Baseline availability blocked since June 2021 by Safari (54 months)
Web Platform Tests (WPT)
View the latest WPT test results for this featureDeveloper signals
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