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

# Creating an event prop

We are going to continue the implementation of a `Searchbox` component we were working on in the last lesson. 

Click the link below to open the exercise in CodeSandbox:

[CodeSandbox project](https://codesandbox.io/s/react-ts-event-props-p9xqo?fontsize=14)

The `Searchbox` component is at the point where we finished in the last lesson. We are going to create an optional event prop called `onSearch` that is triggered when the search criteria are changed. This will be a function prop that has the criteria as a parameter.

An example consumption of the `onSearch` prop is as follows:

```
<Searchbox onSearch={criteria => console.log(criteria)} />
```

Implement the `onSearch` prop in the `Searchbox` component. This is a function prop, so, remind yourself how we implemented types for function props in the *Creating strongly-typed function components props* lesson.

Often components need to expose event props. In this lesson, we'll learn how to implement event props that are strongly-typed.

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 events

Creating an event prop #