How to enable CORS in MEAN STACK web app?

Question

I am working on a MEAN-STACK application.Using Mean-cli packgae of node. in which i am using darksky weather API, in package name Information. I have 4 other packages in cus

Answer 1

If you only have one Express server, you only need to add the middleware once. Your other modules are probably provided as middleware to the server.

If you register a middleware function without any qualifying path, like app.use(function(){ ... }), the middleware will run for every request processed by the server. It does not matter what other middleware is invoked by any given request.

If you have multiple Express servers running simultaneously (this is fairly unlikely), then you will need to add the middleware to each server.