I followed this, but once it was all working I started finding rollup to be incredibly flaky - especially surrounding the watch ability. Three are a bunch of issues on rollup's github that haven't been solved, they've just closed them to make it seem like they have (a pet peeve of mine).

There are also many issues with having mulitple `package.json` in a project - it's a huge problem with some IDEs, or pretty much anything which attempts to autodetect settings from package.json.

Can I recommend react Storybook? I've found ti today - it solves this exact use case, does it very elegantly and provides a whole bunch of tools to generate your documentation and 'playbox' for you.