PositionOptions

PositionOptions 是一个作为 Geolocation.getCurrentPosition()方法 以及 Geolocation.watchPosition() 方法参数的选项，此选项含有3种可以设置的属性。

Properties

The PositionOptions interface doesn't inherit any property.

PositionOptions.enableHighAccuracy

Is a Boolean that indicates the application would like to receive the best possible results. If true and if the device is able to provide a more accurate position, it will do so. Note that this can result in slower response times or increased power consumption (with a GPS chip on a mobile device for example). On the other hand, if false, the device can take the liberty to save resources by responding more quickly and/or using less power. Default: false.

PositionOptions.timeout

Is a positive long value representing the maximum length of time (in milliseconds) the device is allowed to take in order to return a position. The default value is Infinity, meaning that getCurrentPosition() won't return until the position is available.

PositionOptions.maximumAge

Is a positive long value indicating the maximum age in milliseconds of a possible cached position that is acceptable to return. If set to 0, it means that the device cannot use a cached position and must attempt to retrieve the real current position. If set to Infinity the device must return a cached position regardless of its age. Default: 0.

Methods

The PositionOptions interface neither implements, nor inherits any method.

Specifications

Browser compatibility

See also

• Using geolocation
• The Geolocation interface that uses it.