Readings: Express REST API

Review: ES6 Classes

Classes are a template for creating __

• Classes are a template for creating objects

Can a class declaration be hoisted?

• A class must be defined before it is constructed. If a class is not defined before it is constructed it will throw an error when the dev attempts to compile the application.

How would you describe a constructor and contextual “this” to a non-technical friend?

• A constructor can be seen as a “fill in the blank” template that can be filled in using the this.<parameter> syntax to apply a value to the various elements of a constructor

Using Express Routing

Within Express, what does routing refer to?

• Routing refers to that way that an Express server handles URI endpoints that can be accessed by the user.

What is the difference between a route path and a route method?

• Methods are attached to an instance of an express class.

• Routes are established to handle user input at defined web endpoints

When is it appropriate to add next as a parameter to a route handler and what must you do if next has been passed to your middleware as a parameter?

• Whenever the route handler needs to bypass multiple callbacks you are able to use the next parameter to bypass unneeded callbacks

Express Routing

What is an Express Router?

• Express Router is a class that helps us create router handlers or router objects

How do we initialize express.Router() in an express server?

• You can call express.Router() using const or let router = express.Router()'

What do we use route middleware for?

• This is used to perform functions before the request, response cycle is completed.