I have a library with src/ and lib/ and compiling with babel —source-maps inline. src -> lib. I use this library in another project (webpack+babel-loader).
When not inline, the source-maps aren’t available. It points to the files - lib/a.js instead of src/a.js. So you'd have to use inline source-maps
When source-maps are inline, babel generates lib/a.js correctly, but webpack build fails with the message - Module build failed: Error: No element indexed by 1