Web features explorer

Event timing performance entries

Newly Available (since 2025-12-12)
Expected to be Widely Available on 2028-06-12

An event or first-input performance entry 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.

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 26.2 Released on 2025-12-12
  • Safari on iOS 26.2 Released on 2025-12-12

MDN documentation

Specifications

Usage (according to Chrome Platform Status)

~46.529% of page loads. More data at chromestatus.com.

Web Platform Tests (WPT)

View the latest WPT test results for this feature

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