[SOLVED] Inner Errors (exceptions) in JavaScript

Inner Errors (exceptions) in JavaScript

Is there a preferred way to include inner exceptions when throwing exceptions in JavaScript?

I'm relatively new to JavaScript coming from a C# background. In C#, you can do the following:

try 
{
  // Do stuff
}
catch (Exception ex)
{
  throw new Exception("This is a more detailed message.", ex);
}

In the samples I've seen in JavaScript, I haven't been able to find how to catch an exception, add a new message, and re-throw the new exception while still passing the original exception.

Solution

You can throw any object you want:

try {
    var x = 1/0; 
}
catch (e) {
    throw new MyException("There is no joy in Mudville", e);
}

function MyException(text, internal_exception) {
    this.text = text;
    this.internal_exception = internal_exception;
}

Then an error will be thrown of type MyException with properties text and internal_exception.