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

## Inferred useState type

The [`useState`](https://reactjs.org/docs/hooks-reference.html#usestate) hook allows us to create a single piece of state.  Click the following link to open a CodeSandbox project that makes use of `useState`:
[CodeSandbox useState project 1](https://codesandbox.io/s/react-ts-usestate-inferred-2419m?fontsize=14)

This is a React and TypeScript project containing a `Counter` component with a piece of state called `count`.

What type is the `count` state?

# Inferred useState type

The [`useState`](https://reactjs.org/docs/hooks-reference.html#usestate) hook allows us to create a single piece of state.  Click the following link to open a CodeSandbox project that makes use of `useState`:
[CodeSandbox useState project 1](https://codesandbox.io/s/react-ts-usestate-inferred-2419m?fontsize=14)

This is a React and TypeScript project containing a `Counter` component with a piece of state called `count`.

What type is the `count` state?

In this lesson, we are going to learn how to create strongly-typed states in a function component with the 'useState' hook.

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

Creating strongly-typed function component states with useState

Inferred useState type #