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
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!
| Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
|---|---|---|---|---|---|---|
| Basic support | 6.0 | (Yes) | 7.0 (7.0) | 9.0 | 15.0 | 未实现 |
| Feature | Android | Edge | Firefox Mobile (Gecko) | Firefox OS | IE Phone | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|---|
| Basic support | 未实现 | (Yes) | 7.0 (7.0) | 1.0 (7.0) | 9.0 | 15.0 | 未实现 |
参见
- 它属于
PerformanceTiming接口。