This interface of this property is deprecated in the Navigation Timing Level 2 specification. Please use the PerformanceNavigationTiming interface instead.
The legacy PerformanceTiming.requestStart read-only property returns an unsigned long long representing the moment, in miliseconds since the UNIX epoch, when the browser sent the request to obtain the actual document, from the server or from a cache. If the transport layer fails after the start of the request and the connection is reopened, this property will be set to the time corresponding to the new request.
time = performanceTiming.requestStart;
| Specification | Status | Comment |
|---|---|---|
| Navigation Timing The definition of 'PerformanceTiming.requestStart' in that specification. | Recommendation | Initial definition. |
| Desktop | ||||||
|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | |
| Basic support | 6 | Yes | 7 | 9 | 15 | No |
| Mobile | |||||||
|---|---|---|---|---|---|---|---|
| Android webview | Chrome for Android | Edge Mobile | Firefox for Android | Opera for Android | iOS Safari | Samsung Internet | |
| Basic support | Yes | Yes | Yes | 7 | 15 | No | ? |
PerformanceTiming interface it belongs to.
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https://developer.mozilla.org/en-US/docs/Web/API/PerformanceTiming/requestStart