We are running into a regression with v3.3.0 when creating an UMD bundle that includes the NPM module oauthio-web.

Including the UMD bundle in a web page results in this error:

Uncaught ReferenceError: require is not defined

I created a repository to demonstrate the error:

https://github.com/Redsift/rollup-common-js-regression

Running

npm install
npm start

opens a browser window. Opening the index.html there shows the error in the developer console.

The code works fine with v3.0.2.

It seems that this regression could be related to the following code change:

Thanks!