Case File · React

Router

Router

Router is a core part of React. In this case file you'll learn what it is, why it matters, and how to use it in real code.

Understanding router well means you can read other people's React code with confidence, and avoid the most common beginner mistakes in this area.

Key points:

  • What router means in the context of React
  • A minimal example you can run or read in the playground on the right
  • A common mistake to avoid when working with router
// React: Router
function demo() {
  console.log("Exploring Router in React");
}

demo();

Tip: Try changing a value in the code on the right and re-running it — small experiments are the fastest way to build real intuition for router.

The Lab
This language is display-only in The Lab — read the code and follow along in your own environment.

React Case File Quiz

Score 70% or higher to unlock your Agent Certification.

1. What is React primarily used for?

2. Which of these is a real chapter covered in the React case file?

3. In The Lab playground, what does the "Reset" button do?

4. What score do you need on this topic's quiz to unlock your Agent Certification?