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 miliseconds 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. |
| Desktop | ||||||
|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | |
| Basic support | 6 | Yes | 7 | 9 | 15 | Yes |
| 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 | Yes | ? |
PerformanceTiming interface it belongs to.PerformanceTiming.fetchStart
© 2005–2018 Mozilla Developer Network and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/PerformanceTiming/fetchStart