概要
PerformanceTiming.navigationStart 是一个返回代表一个时刻的 unsigned long long 型只读属性，为紧接着在相同的浏览环境下卸载前一个文档结束之时的 Unix毫秒时间戳。如果没有上一个文档，则它的值相当于 PerformanceTiming.fetchStart。
语法
time = performanceTiming.navigationStart;
标准
| Specification | Status | Comment |
|---|---|---|
| Navigation Timing PerformanceTiming.navigationStart |
Recommendation | Initial definition. |
浏览器兼容性
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 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Basic support | Chrome Full support 6 | Edge Full support Yes | Firefox Full support 7 | IE Full support 9 | Opera Full support 15 | Safari Full support Yes | WebView Android Full support Yes | Chrome Android Full support Yes | Edge Mobile Full support Yes | Firefox Android Full support 7 | Opera Android Full support 15 | Safari iOS Full support Yes | Samsung 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
- 它属于
PerformanceTiming接口。