Analytics for js libraries on npm

[forivall]

It would be great to have a tool that looks at pqckages that are dependents / dev dependents of your package, and see how often different functions are being used, through static analysis. This would let you see what is and isnt being used, so you could improve the docs, know what can be deprecated, etc.

[sindresorhus]

Check out Sourcegraph. Their static analysis tool is open source.

[Qix-]

Sourcegraph is neat, I've been using it with their Github extension for a while.

As well, Doxygen helps with this. Remember that static analysis is difficult or cumbersome or flat-out inaccurate in certain languages (namely dynamic languages or languages with macros such as C-family languages or Rust).