unloadEventStart

Summary

Returns the time immediately before the user agent starts the unload event of the previous document. If there is no previous document or the previous document has a different origin than the current document, returns zero.

Property of apis/navigation timing/PerformanceTiming apis/navigation timing/PerformanceTiming

Syntax

Note: This property is read-only.

var result = PerformanceTiming.unloadEventStart;

Return Value

Returns an object of type unsigned longunsigned long

Examples

var perftime = performance.timing;
document.write("unloadEventStart: " + perftime.unloadEventStart + "<br />");

Notes

The value reported represents the number of milliseconds between the recorded time and midnight January 1, 1970 (UTC).

Related specifications

Navigation Timing 2: W3C Working Draft

Attributions

Microsoft Developer Network: Windows Internet Explorer API reference Article

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