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Version: 3.0.0-alpha.0

TypeScript Support

Docusaurus is written in TypeScript and provides first-class TypeScript support.

Initialization​

Docusaurus supports writing and using TypeScript theme components. If the init template provides a TypeScript variant, you can directly initialize a site with full TypeScript support by using the --typescript flag.

npx create-docusaurus@latest my-website classic --typescript

Below are some guides on how to migrate an existing project to TypeScript.

Setup​

To start using TypeScript, add @docusaurus/module-type-aliases and the base TS config to your project:

npm install --save-dev typescript @docusaurus/module-type-aliases @docusaurus/tsconfig

Then add tsconfig.json to your project root with the following content:

tsconfig.json
{
  "extends": "@docusaurus/tsconfig",
  "compilerOptions": {
    "baseUrl": "."
  }
}

Docusaurus doesn't use this tsconfig.json to compile your project. It is added just for a nicer Editor experience, although you can choose to run tsc to type check your code for yourself or on CI.

Now you can start writing TypeScript theme components.

Typing the config file​

It is not possible to use a TypeScript config file in Docusaurus unless you compile it yourself to JavaScript.

We recommend using JSDoc type annotations:

docusaurus.config.js
// @ts-check

/** @type {import('@docusaurus/types').Plugin} */
function MyPlugin(context, options) {
  return {
    name: 'my-plugin',
  };
}

/** @type {import('@docusaurus/types').Config} */
const config = {
  title: 'Docusaurus',
  tagline: 'Build optimized websites quickly, focus on your content',
  organizationName: 'facebook',
  projectName: 'docusaurus',
  plugins: [MyPlugin],
  presets: [
    [
      '@docusaurus/preset-classic',
      /** @type {import('@docusaurus/preset-classic').Options} */
      ({
        docs: {
          path: 'docs',
          sidebarPath: 'sidebars.js',
        },
        blog: {
          path: 'blog',
          postsPerPage: 5,
        },
      }),
    ],
  ],
  themeConfig:
    /** @type {import('@docusaurus/preset-classic').ThemeConfig} */
    ({
      colorMode: {
        defaultMode: 'dark',
      },
      navbar: {
        hideOnScroll: true,
        title: 'Docusaurus',
        logo: {
          alt: 'Docusaurus Logo',
          src: 'img/docusaurus.svg',
          srcDark: 'img/docusaurus_keytar.svg',
        },
      },
    }),
};

module.exports = config;
tip

Type annotations are very useful and help your IDE understand the type of config objects!

The best IDEs (VS Code, WebStorm, IntelliJ...) will provide a nice auto-completion experience.

info

By default, the Docusaurus TypeScript config does not type-check JavaScript files.

The // @ts-check comment ensures the config file is properly type-checked when running npx tsc.

Swizzling TypeScript theme components​

For themes that support TypeScript theme components, you can add the --typescript flag to the end of the swizzle command to get TypeScript source code. For example, the following command will generate index.tsx and styles.module.css into src/theme/Footer.

npm run swizzle @docusaurus/theme-classic Footer -- --typescript

All official Docusaurus themes support TypeScript theme components, including theme-classic, theme-live-codeblock, and theme-search-algolia. If you are a Docusaurus theme package author who wants to add TypeScript support, see the Lifecycle APIs docs.