Experimental: 这是一个实验中的功能

接口 Performance 的只读属性  timeOrigin 返回一个表示 the performance measurement 开始时间的高精度 timestamp


var timeOrigin = performance.timeOrigin

高精度 timestamp,例如 1518354643295.86


Specification Status Comment
High Resolution Time Level 3
Editor's Draft Initial definition.

Browser Compatibility

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help! (en-US)
Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support 62 59 (59) ? 49 ?
Feature Android Webview Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support 62 62 59.0 (59) ? 49 ?只读属性  timeOrigin timestampperformance.timeOrigin