Interaction contentful paint performance entriesLimited availability
An interaction-contentful-paint performance entry measures the duration of an interaction that causes one or more contentful paints. You can use it to measure LCP for soft navigations in single page apps.
Not yet supported in all major browsers — check the table and provide a fallback.
Browser support
DesktopChrome
1–150Not supported
151+Supportedsince Jul 28, 2026
Current: 155Edge
12–150Not supported
151+Supportedsince Jul 31, 2026
Current: 154Firefox
✕Not supportedup to 157
Current: 157Safari
✕Not supportedup to 27
Current: 27MobileChrome Android
18–150Not supported
151+Supportedsince Jul 28, 2026
Current: 155Firefox Android
✕Not supportedup to 157
Current: 157Safari iOS
✕Not supportedup to 27
Current: 27How to use
Not supported in Firefox, Safari, Firefox Android, Safari iOS. Use feature detection below and provide a fallback (or a polyfill) for those browsers.
Example
Full syntax and examples are on MDN: InteractionContentfulPaint.
Feature detection
JS · check before using
if ("InteractionContentfulPaint" in globalThis) {
// InteractionContentfulPaint is available
} else {
// load a polyfill or use a fallback
}Sub-features
Support for each part of the feature (6). The overall table above shows when the whole feature works.
| Sub-feature | Chrome | Edge | Firefox | Safari | Chrome Android | Firefox Android | Safari iOS |
|---|---|---|---|---|---|---|---|
| InteractionContentfulPaint | 151 | 151 | ✕ | ✕ | 151 | ✕ | ✕ |
| InteractionContentfulPaint.interactionId | 151 | 151 | ✕ | ✕ | 151 | ✕ | ✕ |
| InteractionContentfulPaint.largestContentfulPaint | 151 | 151 | ✕ | ✕ | 151 | ✕ | ✕ |
| InteractionContentfulPaint.paintTime | 151 | 151 | ✕ | ✕ | 151 | ✕ | ✕ |
| InteractionContentfulPaint.presentationTime | 151 | 151 | ✕ | ✕ | 151 | ✕ | ✕ |
| InteractionContentfulPaint.toJSON | 151 | 151 | ✕ | ✕ | 151 | ✕ | ✕ |