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How to use TypeScript with React

Mar 10, 2023
This post is written by notion ai


In recent years, TypeScript has become increasingly popular among developers as it adds more structure and safety to JavaScript code. React, on the other hand, is a widely-used JavaScript library for building user interfaces. Combining the two can lead to even more efficient and reliable code. In this blog post, we will discuss how to use TypeScript with React and show some code examples to help you get started.

Benefits of Using TypeScript with React

One of the main benefits of using TypeScript with React is the ability to catch errors during development. TypeScript allows developers to define interfaces and types for their components, which can help prevent common errors like passing incorrect props or using incorrect types. This can save a lot of time and effort in debugging later on.
Another key benefit is the improved developer experience. TypeScript provides better code completion and type checking in editors like Visual Studio Code, making it easier for developers to write code faster and with fewer mistakes.

How to Use TypeScript with React

To use TypeScript with React, you first need to install the necessary dependencies. You can do this by running the following command in your terminal:
npm install --save-dev typescript @types/react @types/react-dom
After installing the dependencies, you can start using TypeScript in your React project by renaming your .js files to .tsx files. This tells TypeScript that the files contain React components and should be treated as such.
You can also define interfaces for your components to ensure they receive the correct props and have the correct state. Here is an example:
interface Props { name: string; } interface State { age: number; } class MyComponent extends React.Component<Props, State> { render() { return ( <div> <p>Name: {}</p> <p>Age: {this.state.age}</p> </div> ); } }
In this example, we have defined interfaces for the Props and State of the MyComponent class. This ensures that the component receives a name prop of type string and has a state property with an age of type number.


Using TypeScript with React can help improve the reliability and efficiency of your code. By defining interfaces and types for your components, you can catch errors early and improve the developer experience. With the help of the code examples provided, you should now be able to start using TypeScript with React in your own projects. Happy coding!