try catch error in javascript - get more error details

Question

How can I get more error details from a javascript catch?

Are there more parameters to get more details from the caught error.

try { 
    var s = null;
    var t = s.toString();
  } catch(err) {
    alert(err);
  }

Answer 1

The Error Object has several properties that you can use. One property you can use to get the message of the error, is .message, as in:

catch(err) {
    alert(err.message);
  }

The .name property returns the type of error as in:

catch(err) {
    x = err.name;
    //  ... do something based on value of x
  }

The name describes the type of error, and the value of .name can be : EvalError, RangeError, ReferenceError, SyntaxError, TypeError , and URIError. You may decide to handle the error differently depending on the error type which is returned by the .name property.

A good tutorial can be found on JavaScriptKit. The is also an article on the error object at Mozilla Developer Network.