安全上下文
此特征只可用于
安全上下文
(HTTPS),在某些或所有
支持浏览器
.
GeolocationCoordinates.speed
read-only property is a
double
representing the velocity of the device in meters per second. This value is
null
if the implementation is not able to measure it.
let speed = geolocationCoordinatesInstance.speed
A
double
representing the velocity of the device in meters per second.
| 规范 | 状态 | 注释 |
|---|---|---|
|
地理位置 API
The definition of 'GeolocationCoordinates.speed' in that specification. |
推荐 | 最初的规范。 |
| 桌面 | 移动 | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
speed
|
Chrome 5 | Edge 12 | Firefox 3.5 | IE 9 |
Opera
16
|
Safari 5 | WebView Android 37 | Chrome Android 18 | Firefox Android 4 |
Opera Android
16
|
Safari iOS ? | Samsung Internet Android 1.0 |
完整支持
兼容性未知
GeolocationCoordinates