How do you find out which NPM modules depend on yours?

Question

It's easy to see what modules a specific module depends on but I can't seem to find out how to see what modules depend on a specific module. Is there a simple way to do this? If so, is there a way to do this programmatically?

Answer 1

Update: The registry API has changed, and may or may not let you talk directly to underlying CouchDB database. Fortunately, there is still a public mirror provided for replication at https://skimdb.npmjs.com/registry that you can still send queries to. To use:

https://skimdb.npmjs.com/registry/_design/app/_view/dependedUpon?group_level=3&startkey=%5B"socket.io"%5D&endkey=%5B"socket.io"%2C%7B%7D%5D&skip=0&limit=1000 

For ease of reading, here are the querystring parameters from the example:

{ group_level: 3,   startkey: '["socket.io"]',   endkey: '["socket.io", {}]',   skip: 0,   limit: 1000 } 

Note that as stated above, these are parameters for a CouchDB request. There doesn't seem to be an endpoint on the official API to get this data, but there's an issue open for the registry that you can follow here.

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The closest thing you'd get to doing that is probably requesting JSON from the npm registry. For example, to get the packages dependent on Socket.IO, send a GET request to this link:

http://registry.npmjs.org/-/_view/dependedUpon?group_level=3&startkey=%5B%22socket.io%22%5D&endkey=%5B%22socket.io%22%2C%7B%7D%5D&skip=0&limit=1000 

Answer 2

You can browse them on npmjs.com itself, by going to a URLs like, for example, https://www.npmjs.com/browse/depended/markdown-it