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More descriptive error codes

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In the event that geolocation fails, your callback function will receive a PositionError object. The object will include an attribute named code that will have a value of 1, 2, or 3. Each of these numbers signifies a different kind of error; the getErrorCode() function below takes the PositionError.code as its only argument and returns a string with the name of the error that occurred. 

var getErrorCode = 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";
  }
};

It can be used in geolocationFailure() like so: 

var geolocationFailure = function(err) {
  console.log("ERROR (" + getErrorCode(err) + "): " + err.message);
};
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Geolocation:
* Syntax
* Remarks
* Get a users latitude and longitude
* More descriptive error codes
* Get updates when a users location changes
Table Of Contents
0 Getting started
1 Comments
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3 Built-in constants
4 Variables
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88 postMessage and MessageEvent
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97 How to make iterator usable inside async callback function
98 Context this
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100 Vibration API
101 Fluent API
102 Tilde
103 Security issues
104 Get and set CSS custom variables
105 Contributors