---
id: adding-typescript
title: Adding TypeScript
---

> Note: this feature is available with `react-scripts@2.1.0` and higher.

[TypeScript](https://www.typescriptlang.org/) is a typed superset of JavaScript that compiles to plain JavaScript.

To start a new Create React App project with [TypeScript](https://www.typescriptlang.org/), you can run:

```bash
$ npx create-react-app my-app --typescript
$ # or
$ yarn create react-app my-app --typescript
```

To add [TypeScript](https://www.typescriptlang.org/) to a Create React App project, first install it:

```bash
$ npm install --save typescript @types/node @types/react @types/react-dom @types/jest
$ # or
$ yarn add typescript @types/node @types/react @types/react-dom @types/jest
```

Next, rename any file to be a TypeScript file (e.g. `src/index.js` to `src/index.tsx`) and **restart your development server**!

Type errors will show up in the same console as the build one.

To learn more about TypeScript, check out [its documentation](https://www.typescriptlang.org/).

> **Note:** You are not required to make a [`tsconfig.json` file](https://www.typescriptlang.org/docs/handbook/tsconfig-json.html), one will be made for you.
> You are allowed to edit the generated TypeScript configuration.

> **Note:** If you are currently using [create-react-app-typescript](https://github.com/wmonk/create-react-app-typescript/), see [this blog post](https://vincenttunru.com/migrate-create-react-app-typescript-to-create-react-app/) for instructions on how to migrate to Create React App.

> **Note:** We recommend using [VSCode](https://code.visualstudio.com/) for a better integrated experience.

> **Note:** Constant enums and namespaces are not supported.