Limited Availability Performance

Back/forward cache blocking reasons

The notRestoredReasons property of a PerformanceNavigationTiming object explains why the current document was blocked from using the back/forward cache (also known as the bfcache) on navigation.

Baseline Status: This feature is currently Limited (not yet Baseline). Latest engine implementation shipped on May 17, 2024.

Desktop Browser Engine Support

Google Chrome

125

Supported

Mozilla Firefox

—

Unsupported

Apple Safari

—

Unsupported

Microsoft Edge

125

Supported

Mobile Browser Engine Support

Chrome Android

125

Firefox Android

—

Safari iOS

—

Specifications and References

Specification ↗ Feature XML ↗

MDN Browser Compat Data Keys:

api.NotRestoredReasonDetails ↗ api.NotRestoredReasonDetails.reason ↗ api.NotRestoredReasonDetails.toJSON ↗ api.NotRestoredReasons ↗ api.NotRestoredReasons.children ↗ api.NotRestoredReasons.id ↗ api.NotRestoredReasons.name ↗ api.NotRestoredReasons.reasons ↗ api.NotRestoredReasons.src ↗ api.NotRestoredReasons.toJSON ↗ api.NotRestoredReasons.url ↗ api.PerformanceNavigationTiming.notRestoredReasons ↗