Using TypeScript in React

Alright, we’ve made it this far! We’ve learned about the basics of TypeScript and talked about its benefits. Now, it’s time to roll up our sleeves and get our hands dirty with some practical TypeScript in React.

In this section, we’re going to explore how to use TypeScript to type-check all the different parts of a React application. We’ll look at components, props, state, event handlers, context, and even refs. Don’t worry: I’ll walk you through plenty of examples to help illustrate these concepts.

Type-checking props in React components

In a React application, one of the primary areas where we can leverage TypeScript is in our components, specifically with props. Let’s see the example:

type GreetingProps = {
  name: string;
};
const Greeting = ({ name }: GreetingProps) => {
  return <h1>Hello, {name}!</h1>;
};

In this example, we’re defining a GreetingProps...