This interface of this property is deprecated in the Navigation Timing Level 2 specification. Please use the PerformanceNavigationTiming interface instead.

The legacy PerformanceTiming.fetchStart read-only property returns an unsigned long long representing the moment, in milliseconds since the UNIX epoch, the browser is ready to fetch the document using an HTTP request. This moment is before the check to any application cache.


time = performance.timing.fetchStart;


Specification Status Comment
Navigation Timing
The definition of 'PerformanceTiming.fetchStart' in that specification.
Recommendation Initial definition.

Browser compatibility

BCD tables only load in the browser

See also