camelcase requirement causes uncaught exception error with version 1.1.0 of http-proxy-middleware

Following the upgrade to v1.1.0 of http-proxy-middleware, my application started spamming uncaught exception errors during to an invalid regular expression: /[_.\- ]+([\p{Alpha}\p{N}_]|$)/:

Full error message:

2021-04-01 17:50:58.156 C | UNCAUGHT EXCEPTION: Invalid regular expression: /[_.\- ]+([\p{Alpha}\p{N}_]|$)/: Invalid escape
2021-04-01 17:50:58.157 C | SyntaxError: Invalid regular expression: /[_.\- ]+([\p{Alpha}\p{N}_]|$)/: Invalid escape

The invalid regular expression that this is complaining about results from the import of camelcase (v.6.2.0). The index.js of camelcase contains this function:

const postProcess = (input, options) => {
        return input.replace(/[_.\- ]+([\p{Alpha}\p{N}_]|$)/gu, (_, p1) => p1.toLocaleUpperCase(options.locale))
                .replace(/\d+([\p{Alpha}\p{N}_]|$)/gu, m => m.toLocaleUpperCase(options.locale));
};

client info

RHEL 6/7

[lpbz]

@chimurai 1.1.1-alpha.1 was not working for me and actually caused my application to crash. I must’ve not called it correctly in the package.json. But http-proxy-middleware@1.1.1 worked for my application…everything looks great.

Thanks for taking care of this.

[jens-maus]

@jens-maus Would be great if you could give a try with http-proxy-middleware@1.1.1-alpha.1 to confirm the fix.

I just could test the latest 1.1.1 version and the issue is definitely fixed in that version. Thanks!