Starting from Apps-Engine v1.28.0 (released in Rocket.Chat v4.0), Rocket.Chat Apps include a subset of NPM packages as runtime dependencies. While the exact list of supported packages cannot be specified due to the vast number of options available, here are some general guidelines:
Utility packages that are not dependent on NodeJS' native modules should work (for example,
lodash,momentjs, etc).Packages that create any server, be it HTTP, TCP, UDP, or IPC, will not work (for example,
express,hapi, etc).Packages that interact with the
fsandosmodules will not work.
If a package that should be compatible is not working as expected, open an issue in the Rocket.Chat.Apps-engine repository and the team will check it out.
When using NPM packages in your app, make sure to use the latest
rc-appsversion - it is responsible for bundling the code of the packages along with the app's source code.