You can expose data to views using: app.local and res.locals. Does someone know exactly what the difference between the two is? Thanks
From the express.js API Doc:
Application local variables are provided to all templates rendered within the application. This is useful for providing helper functions to templates, as well as app-level data.
Response local variables are scoped to the request, thus only available to the view(s) rendered during that request / response cycle, if any. Otherwise this API is identical to app.locals.
This means the only difference is that res.locals are only valid for the lifetime of the request.