Add user callback for handling invalid characters.

[ashtuchkin]

Inspired by ICU, something like:

  buf = iconv.encode(str, 'win1251', { invalidCharHandler: function(char) {
    // Here you can either throw exception which will be propagated outside,
    // or return a replacement char.
  });

Probably, some default handlers would also be nice (always throwing, always returning '?', trying to transliterate).

[peakji]

Any news on this? This would be a great feature to have.

[ashtuchkin]

I agree, I don't really have time to do it now. The main obstacle is that we need to reimplement all the native Node encodings from scratch to support this feature and it's not easy.

[bpasero]

Yes, would also be interested in this. I think this would enable VS Code to implement a dialog like this one:

Refs: microsoft/vscode#44505

[lapo-luchini]

The main obstacle is that we need to reimplement all the native Node encodings from scratch to support this feature and it's not easy.

Maybe re-encoding to original charset and checking that input and regenerated string are equals?
I guess it should be faster than re-implementing that. (but truth be said, I didn't check the code)