This interface of this property is deprecated in the Navigation Timing Level 2
specification. Please use the PerformanceNavigationTiming
interface instead.
The legacy
PerformanceTiming
.navigationStart
read-only property returns an unsigned long long
representing the moment,
in milliseconds since the UNIX epoch, right after the prompt for unload terminates on
the previous document in the same browsing context. If there is no previous document,
this value will be the same as PerformanceTiming.fetchStart
.
Syntax
time = performanceTiming.navigationStart;
Specifications
Specification | Status | Comment |
---|---|---|
Navigation Timing The definition of 'PerformanceTiming.navigationStart' in that specification. |
Recommendation | Initial definition. |
Browser compatibility
BCD tables only load in the browser
See also
- The
PerformanceTiming
interface it belongs to.