Adding routing

Frontend apps are usually made up of multiple pages, as is our to-do app. We will achieve this with routing, which allows different page components to render, depending on the app’s path. As we are building a single-page app, this routing will be done in the frontend code, rather than the backend, which would be the case for a multi-page app.

We’ll use React Router (reactrouter.com) to handle routing in our app. It is installed by running the following command in the frontend directory:

npm install react-router-dom

Single-page app

A single-page app, often called an SPA, refers to a web app whereby only a single page is fetched from the backend server. This single page is then able to render all the pages within the app. This is an advantage as navigating from one page to another is typically quicker in an SPA; however, this comes with the cost of a larger initial download.

I find it clearer to place all the routing into a single component...