How do I properly throw OperationError?

[TPTPWDotACoEMW]

I'm creating a module for CyberChef, and I want it to throw an OperationError. Currently, my line of code that throws the error looks like this:

throw new OperationError("The key must consist only of letters in the English alphabet");

(I should note this is the same line of code that throws an error without issue in the Bifid Cipher operations.)

However, the error that ends up thrown is instead "undefined," and I can't tell why. I assume there's something else I need to update somewhere, but I don't know where to look for that.

[dfbustosus]

The throw statement is correct. The problem is the import in TrifidCipherEncode.mjs.

Your fork currently has:

import Operation from "../Operation.mjs";
import OperationError from "../Operation.mjs";

Change the second line to:

import OperationError from "../errors/OperationError.mjs";

At the moment, new OperationError(...) is actually constructing another instance of the ordinary Operation class. That constructor ignores the string and does not create an Error.message. Because the thrown object is not a real OperationError, CyberChef enters its generic error path and formats e.message, producing undefined.

No other registration or error configuration is needed. This is the same import used by the Bifid operations.

Relevant source: the two incorrect imports in the fork, the real OperationError, and CyberChef's fallback formatting path.

[TPTPWDotACoEMW]

A bit of a shock I missed that for as long as I did... Thank you!