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Express REST API

1. Name 3 real world use cases where you’d want to change the request with custom middleware
   • handling error.
   • change in request object or response object
   • to do something into request object.
2. True or false: The route handler is middleware? false
3. In what ways can a middleware function end the process and send data to the browser?
   • if it at the final middleware function
   • if it face an issue and pass the error in next .
4. At what point in the request lifecycle can you “inject” middleware?

   Middleware is a function which is called when send request before the route handler.

5. What can cause express to error with “Request headers sent twice, cannot start a second response”

   when you send more than one request to the server and make interupt between this requests, so kindlly he dell with this requests by send a response have an error.

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