Soft navigation performance entriesLimited availability
A soft-navigation performance entry measures the duration of a soft navigation in a single page app. A soft navigation is defined as when a trusted user interaction causes a URL update and a visible contentful paint to the screen.
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: PerformanceSoftNavigation.
Feature detection
JS · check before using
if ("PerformanceSoftNavigation" in globalThis) {
// PerformanceSoftNavigation is available
} else {
// load a polyfill or use a fallback
}Sub-features
Support for each part of the feature (7). The overall table above shows when the whole feature works.
| Sub-feature | Chrome | Edge | Firefox | Safari | Chrome Android | Firefox Android | Safari iOS |
|---|---|---|---|---|---|---|---|
| PerformanceSoftNavigation | 151 | 151 | ✕ | ✕ | 151 | ✕ | ✕ |
| PerformanceSoftNavigation.getLargestInteractionContentfulPaint | 151 | 151 | ✕ | ✕ | 151 | ✕ | ✕ |
| PerformanceSoftNavigation.interactionId | 151 | 151 | ✕ | ✕ | 151 | ✕ | ✕ |
| PerformanceSoftNavigation.navigationType | 151 | 151 | ✕ | ✕ | 151 | ✕ | ✕ |
| PerformanceSoftNavigation.paintTime | 151 | 151 | ✕ | ✕ | 151 | ✕ | ✕ |
| PerformanceSoftNavigation.presentationTime | 151 | 151 | ✕ | ✕ | 151 | ✕ | ✕ |
| PerformanceSoftNavigation.toJSON | 151 | 151 | ✕ | ✕ | 151 | ✕ | ✕ |