scream.js throws error --- "exports is not defined"

Is there something I'm missing? I copied the entire `brim/demo/basic/index.html`, changed the javascript locations to point to my local `node_modules/brim/...`. And I got that error.

Node.js issues?

Reproduce the error using brim/demo/basic/index.html with the JavaScript paths pointed at the local node_modules/brim files. Start with the script that loads scream.js and inspect the reported “exports is not defined” failure; done means the demo runs without that error and the cause or required change is documented.

Written by the indexing model from the issue text.