PerformanceTiming.requestStart

概要

PerformanceTiming.requestStart 是一个返回代表一个时刻的 unsigned long long 型只读属性,为浏览器发送从服务器或者缓存获取实际文档的请求之时的 Unix毫秒时间戳。如果传输层在请求开始之后发生错误并且连接被重新打开,则该属性将会被设定为新的请求的相应的值 。

语法

time = performanceTiming.requestStart;

标准

Specification Status Comment
Navigation Timing
PerformanceTiming.requestStart
Recommendation Initial definition.

浏览器兼容性

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
requestStart
Deprecated
Chrome Full support 6Edge Full support 12Firefox Full support 7IE Full support 9Opera Full support 15Safari Full support 11WebView Android Full support YesChrome Android Full support 18Firefox Android Full support 7Opera Android Full support 14Safari iOS Full support 11Samsung Internet Android ?

Legend

Full support  
Full support
Compatibility unknown  
Compatibility unknown
Deprecated. Not for use in new websites.
Deprecated. Not for use in new websites.

参见

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