GeolocationCoordinates 以下を移行

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+---
+title: GeolocationCoordinates.heading
+slug: Web/API/GeolocationCoordinates/heading
+tags:
+  - API
+  - Geolocation API
+  - GeolocationCoordinates
+  - Property
+  - Secure context
+  - heading
+browser-compat: api.GeolocationCoordinates.heading
+---
+{{securecontext_header}}{{APIRef("Geolocation API")}}
+
+The **`GeolocationCoordinates.heading`** read-only property is
+a `double` representing the direction in which the device is traveling. This
+value, specified in degrees, indicates how far off from heading due north the device is.
+`Zero` degrees represents true north, and the direction is determined
+clockwise (which means that east is `90` degrees and west is `270`
+degrees). If {{domxref("GeolocationCoordinates.speed")}} is `0`,
+`heading` is
+[`NaN`](/en-US/docs/Web/JavaScript/Reference/Global_Objects/NaN). If
+the device is not able to provide heading information, this value is `null`.
+
+## Syntax
+
+```js
+let heading = geolocationCoordinatesInstance.heading
+```
+
+### Value
+
+A `double` representing the direction in which the device is traveling.
+
+## Specifications
+
+{{Specifications}}
+
+## Browser compatibility
+
+{{Compat}}
+
+## See also
+
+- [Using the Geolocation API](/en-US/docs/Web/API/Geolocation_API/Using_the_Geolocation_API)
+- {{domxref("GeolocationCoordinates")}}