Twitter authentication breaks with undefined in place of String value

[fzero]

I've just found this bug while trying Oauth.io. The quickfix was simply to typecast the value with String() in the /dist JS code but you'll probably want to port it to your CoffeeScript source.

The issue is at https://github.com/oauth-io/oauth-js/blob/master/dist/oauth.js#L767

I fixed it locally changing it from:

client_states[k] = v.replace(/\s+/g, "");

to:

client_states[k] = String(v).replace(/\s+/g, "");

[zachelrath]

I experienced this as well with other authentication providers (e.g. Salesforce) --- workaround by @fzero worked for me.