可能存在用户不想与您共享其位置数据的情况。为了处理这种情况，您可以在调用函数时提供两个getCurrentLocation()函数。
如果您的地理位置尝试成功，则调用第一个函数，如果您的地理位置尝试失败，则调用第二个函数。让我们看一个例子：
例试试这个代码»
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Handling Geolocation Errors</title>
<script>
// Set up global variable
var result;
function showPosition() {
// Store the element where the page displays the result
result = document.getElementById("result");
// If geolocation is available, try to get the visitor's position
if(navigator.geolocation) {
navigator.geolocation.getCurrentPosition(successCallback, errorCallback);
result.innerHTML = "Getting the position information...";
} else {
alert("Sorry, your browser does not support HTML5 geolocation.");
}
};
// Define callback function for successful attempt
function successCallback(position) {
result.innerHTML = "Your current position is (" + "Latitude: " + position.coords.latitude + ", " + "Longitude: " + position.coords.longitude + ")";
}
// Define callback function for failed attempt
function errorCallback(error) {
if(error.code == 1) {
result.innerHTML = "You've decided not to share your position, but it's OK. We won't ask you again.";
} else if(error.code == 2) {
result.innerHTML = "The network is down or the positioning service can't be reached.";
} else if(error.code == 3) {
result.innerHTML = "The attempt timed out before it could get the location data.";
} else {
result.innerHTML = "Geolocation failed due to unknown error.";
}
}
</script>
</head>
<body>
<div id="result">
<!--Position information will be inserted here-->
</div>
<button type="button" onclick="showPosition();">Show Position</button>
</body>
</html>
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