# Setup TypeScript

This recipe helps you start developing with the popular TypeScript language.

This recipe:

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Installs necessary NPM packages.

<NPMPackage name="typescript" />
<NPMPackage name="gatsby-plugin-typescript" />
<NPMPackage name="@typescript-eslint/parser" />
<NPMPackage name="@typescript-eslint/eslint-plugin" />

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Installs the plugin `gatsby-plugin-typescript` in your `gatsby-config.js`.

<GatsbyPlugin name="gatsby-plugin-typescript" />

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Adds a `tsconfig.json` file to control how TypeScript processes your code.

<File path="tsconfig.json" content="https://raw.githubusercontent.com/microsoft/TypeScript-Website/0afd526969d98c321787ab1962f72f9361ab54bd/packages/typescriptlang-org/tsconfig.json" />

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After installing this recipe, you can add TypeScript code, components, and pages in your sites `src` directory.