js獲取用戶實時地理位置

if(navigator.geolocation) {
    var id = navigator.geolocation.watchPosition(function(position){
        console.log("緯度" + position.coords.latitude + "經度" + position.coords.longitude)
    }, function(err){
        switch(err.code) {
            case err.PERMISSION_DENIED: return "PERMISSION_DENIED";
            case err.POSITION_UNAVAILABLE: return "POSITION_UNAVAILABLE";
            case err.TIMEOUT: return "TIMEOUT";
            default: return "UNKNOWN_ERROR";
        }
    })
    // navigator.geolocation.clearWatch(id); 停止監視
}else {
    console.log("你的瀏覽器不支持geolocation");
}

js獲取用戶實時地理位置