license: Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the “License”); you may not use this file except in compliance with the License. You may obtain a copy of the License at
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Watches for changes to the device's current position.
var watchId = navigator.geolocation.watchPosition(geolocationSuccess, [geolocationError], [geolocationOptions]);
geolocation.clearWatch
to stop watching for changes in position.geolocation.watchPosition
is an asynchronous function. It returns the device's current position when a change in position has been detected. When the device has retrieved a new location, the geolocationSuccess
callback is invoked with a Position
object as the parameter. If there is an error, the geolocationError
callback is invoked with a PositionError
object.
// onSuccess Callback // This method accepts a `Position` object, which contains // the current GPS coordinates // function onSuccess(position) { var element = document.getElementById('geolocation'); element.innerHTML = 'Latitude: ' + position.coords.latitude + '<br />' + 'Longitude: ' + position.coords.longitude + '<br />' + '<hr />' + element.innerHTML; } // onError Callback receives a PositionError object // function onError(error) { alert('code: ' + error.code + '\n' + 'message: ' + error.message + '\n'); } // Options: throw an error if no update is received every 30 seconds. // var watchID = navigator.geolocation.watchPosition(onSuccess, onError, { timeout: 30000 });
<!DOCTYPE html> <html> <head> <title>Device Properties Example</title> <script type="text/javascript" charset="utf-8" src="cordova-1.8.0.js"></script> <script type="text/javascript" charset="utf-8"> // Wait for Cordova to load // document.addEventListener("deviceready", onDeviceReady, false); var watchID = null; // Cordova is ready // function onDeviceReady() { // Throw an error if no update is received every 30 seconds var options = { timeout: 30000 }; watchID = navigator.geolocation.watchPosition(onSuccess, onError, options); } // onSuccess Geolocation // function onSuccess(position) { var element = document.getElementById('geolocation'); element.innerHTML = 'Latitude: ' + position.coords.latitude + '<br />' + 'Longitude: ' + position.coords.longitude + '<br />' + '<hr />' + element.innerHTML; } // onError Callback receives a PositionError object // function onError(error) { alert('code: ' + error.code + '\n' + 'message: ' + error.message + '\n'); } </script> </head> <body> <p id="geolocation">Watching geolocation...</p> </body> </html>