Gain insights into integrating TypeScript with React to improve productivity. Learn about strongly-typed props, state, and events, and set up projects using Create React App, Webpack, and Babel.

If you are a React developer and want to build your React apps faster and more robustly, this course is for you. Learn to integrate TypeScript with React, boost your productivity, and create apps that are easier to maintain.

In this course, you will learn how to utilize TypeScript’s sophisticated type system to make React development faster and your code more readable. You will learn how to create component props, state, and events that are strongly-typed, allowing you to quickly understand what you can pass and helping you avoid mistakes.

Lastly, you will set up React projects with TypeScript. First, you will learn how to do this with the Create React App tool, then how to create a React and TypeScript project with Webpack and Babel.

Using TypeScript with React

# Re-open the project in the correct folder

Before we start, we need to open the project we created in the last lesson in the root folder. The root folder should have the same name as your app and should contain the `package.json` file. 

# Linting

Linting is the process of running a program that checks for potential errors. The most popular linter in the JavaScript space at the moment is [**ESLint**](https://eslint.org/). CRA has already installed and configured ESLint to check our React and TypeScript code - neat!

> Note that **TSLint** has been a popular alternative to ESLint for linting TypeScript code but is now deprecated. More information can be found [here](https://medium.com/palantir/tslint-in-2019-1a144c2317a9).

## Configuring ESLint in Visual Studio Code

We can install and configure an ESLint extension in Visual Studio Code to lint and highlight potential errors.  The extension is called **ESLint** and is published by Dirk Baeumer.

Note that you may need to start Visual Studio Code for the extension to start working.

We need to tell VS Code to lint TypeScript code:
- Open **Settings** from the **Preferences** menu on the **File** menu.
- Enter "eslint" in the search box and scroll down to the **Eslint: Probe setting**.



We are going to take our Create React App project to the next level in this lesson by fully setting up linting and also adding a tool that will autoformat the code.

Why TypeScript?

Using basic types

Creating types

Working with generic types

Creating strongly-typed function component props

Creating strongly-typed function component state

Creating strongly-typed class components

Creating strongly-typed component events and event handlers

Creating strongly-typed context

Creating strongly-typed refs

Creating React projects with TypeScript using Create React App

Creating a React and TypeScript project manually

Putting everything together

Configuring linting and adding autoformatting

Re-open the project in the correct folder #

Linting #

Configuring ESLint in Visual Studio Code #