Web/API/PerformanceTiming/responseStart

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

The legacy PerformanceTiming.responseStart read-only property returns an unsigned long long representing the moment in time (in milliseconds since the UNIX epoch) when the browser received the first byte of the response from the server, cache, or local resource.

Syntax

time = performanceTiming.responseStart;

Specifications

Specification	Status	Comment
Navigation TimingThe definition of 'PerformanceTiming.responseStart' in that specification.	Recommendation	Initial definition.

Browser compatibility

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
responseStart Deprecated'	Chrome Full support 6	Edge Full support 12	Firefox Full support 7	IE Full support 9	Opera Full support 15	Safari Full support 11	WebView Android Full support Yes	Chrome Android Full support 18	Firefox Android Full support 7	Opera Android Full support 14	Safari iOS Full support 11	Samsung Internet Android Full support 1.0

Legend

Full support  

Full support

Deprecated. Not for use in new websites.'

Deprecated. Not for use in new websites.

See also

• The PerformanceTiming interface it belongs to.

PerformanceTiming.responseStart by Mozilla Contributors is licensed under CC-BY-SA 2.5.