2001 React-Router-Prework.md

React Router Prework

This gist contains a short assignment I'd like everyone to complete before our formal lesson. The prework involves reading some of the React Router documentation, and will allow us to keep the lesson more hands on.

Instructions

1. Fork this gist
2. On your own copy, go through the listed readings and answer associated questions
3. Comment a link to your forked copy on the original gist

Questions / Readings

Router Overview

React Router is a library that allows us to make our single page React applications mimic the behavior of multipage apps. It provides the ability to use browser history, allowing users to navigate with forward / back buttons and bookmark links to specific views of the app. Most modern sites use some form of routing. React Router exposes this functionality through a series of components. Let's start by looking at the overall structure of an app using router:

1. Take a look at the quick start page of the React Router docs. Take note of the syntax and organization of the page. No worries if this looks unclear right now! (nothing to answer here)

2. What package do we need to install to use React Router? If you need to create the React app,

npm install -g create-react-app
create-react-app demo-app
cd demo-app

if it's already created, then just: npm install react-router-dom

Router Components

React Router provides a series of helpful components that allow our apps to use routing. These can be split into roughly 3 categories:

• Routers
• Route Matcher
• Route Changers

Routers

Any code that uses a React-Router-provided component must be wrapped in a router component. There are lots of router components we can use, but we'll focus on one in particular. Let's look into the docs to learn more.

3. What is a <BrowserRouter />?

It's a router that uses the HTML5 history API

4. Why would we use <BrowserRouter /> in our apps?

It allows us to keep our UI in sync with the URL and also lets the user use the back and forward buttons when navigating through the site.

Route Matchers

5. What does the <Route /> component do?

basic compoenent that provides a path for a component to render 6. How does the <Route /> component check whether it should render something?

It checks the component's url against the browser url

7. What does the <Switch /> component do?

It only renders the first route that matches or includes the path. Once it finds the first route that matches the path, it will not continue to look for any other matches.

8. How does it decide what to render?

see above ^

.....I did not have time to finish below (I forgot about this prework), but I did watch a YouTube video last night to familiarize with Router

Route Changers

9. What does the <Link /> component do? How does a user interact with it?

10. What does the <NavLink /> component do? How does a user interact with it?

11. What does the <Redirect /> component do?