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Geolocation clearWatch() API
Description:
The clearWatch method cancels an ongoing watchPosition call. When cancelled, the watchPosition call stops retrieving updates about the current geographic location of the device.
Syntax:
Here is the syntax of this method:
Parameters:
Here is the detail of parameters:
Return value:
The clearWatch method does not return a value.
Example:
<!DOCTYPE HTML>
<head>
<script type="text/javascript">
var watchID;
var geoLoc;
function showLocation(position) {
var latitude = position.coords.latitude;
var longitude = position.coords.longitude;
alert("Latitude : " + latitude + " Longitude: " + longitude);
}
function errorHandler(err) {
if(err.code == 1) {
alert("Error: Access is denied!");
}else if( err.code == 2) {
alert("Error: Position is unavailable!");
}
}
function getLocationUpdate(){
if(navigator.geolocation){
// timeout at 60000 milliseconds (60 seconds)
var options = {timeout:60000};
geoLoc = navigator.geolocation;
watchID = geoLoc.watchPosition(showLocation,
errorHandler,
options);
}else{
alert("Sorry, browser does not support geolocation!");
}
}
function stopWatch(){
geoLoc.clearWatch(watchID);
}
</script>
</head>
<html>
<body>
<form>
<input type="button" onclick="getLocationUpdate();"
value="Watch Update"/>
<input type="button" onclick="stopWatch();"
value="Stop Watch"/>
</form>
</body>
</html>
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