[TOC] ## 概述 語法 ``` interface Geolocation { clearWatch(watchId: number): void; getCurrentPosition(successCallback: PositionCallback, errorCallback?: PositionErrorCallback | null, options?: PositionOptions): void; watchPosition(successCallback: PositionCallback, errorCallback?: PositionErrorCallback | null, options?: PositionOptions): number; } declare var Geolocation: { prototype: Geolocation; new(): Geolocation; }; ``` ## 實例 ### 獲取位置 ``` navigator.geolocation.getCurrentPosition(function(position) { do_something(position.coords.latitude, position.coords.longitude); }); ``` ### 監聽位置 響應定位數據發生的變更（設備發生了移動，或獲取到了更高精度的地理位置信息） ``` var watchID = navigator.geolocation.watchPosition(function(position) { do_something(position.coords.latitude, position.coords.longitude); }); ```