Requiring external library breaks all blocks on development

[kingkero]

Hello,

we're trying to use Sage 10 in a new project which includes this dependency in their Laravel Mix configuration. Sadly though, requiring an external library breaks everything (silently, so I'm not even sure how to debug it).

I have forked Sage 10 and in this commit it everything works as expected:

then basically this was added (in this commit):

import classNames from 'classnames'

and now all blocks are broken. No error message in the console or anything.

This happens to only happen for development build, while production builds are not affected.

[kingkero]

Okay, it was another problem (vendor.js not included) which is already tracked here roots/sage#2413