概要
PerformanceTiming.connectStart 是一个返回代表一个时刻的 unsigned long long 型只读属性，请求连接被发送到网络之时的Unix毫秒时间戳。如果传输层报告错误并且连接的建立重新开始，则把最后建立连接的开始时间作为该值。如果一个持久连接被使用，则该值与 PerformanceTiming.fetchStart 相同。
语法
time = performanceTiming.connectStart;
标准
| Specification | Status | Comment |
|---|---|---|
| Navigation Timing PerformanceTiming.connectStart |
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 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
connectStart | 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 | Edge Mobile Full support Yes | Firefox Android Full support 7 | Opera Android Full support 14 | Safari iOS Full support 11 | 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。