GeolocationCoordinates:heading 屬性
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.
GeolocationCoordinates
介面的 heading
唯讀屬性是一個 double
值,表示裝置正在行進的方向。此值以度數表示,指示裝置偏離正北方向的程度。0
度表示正北,方向是順時針決定的(這意味著東是 90
度,西是 270
度)。如果 GeolocationCoordinates.speed
為 0
,或裝置無法提供方向資訊,heading
為 null
。
值
一個 double
,表示裝置正在行進的方向。
規範
Specification |
---|
Geolocation # heading-attribute |
瀏覽器相容性
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