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Fumadocs

Manual Installation

Add Fumadocs to an existing TanStack Start project.

You can also let Fumadocs CLI set it up for you:

npx @fumadocs/cli init

Prerequisites

Before continuing, make sure you have configured:

  • Tailwind CSS 4.
  • Fumadocs MDX: follow the Vite setup guide and create essential files like lib/source.ts.

Good to Know

Fumadocs also supports other content sources, including Content Collections and headless CMS.

Getting Started

Install the packages:

npm i fumadocs-core fumadocs-ui

Styles

Add the following to your Tailwind CSS file:

@import 'tailwindcss';
@import 'fumadocs-ui/css/neutral.css';
@import 'fumadocs-ui/css/preset.css';

Root Provider

Wrap your entire app inside Root Provider, and add the required styles to body.

src/routes/__root.tsx
import { createRootRoute, HeadContent, Outlet, Scripts } from '@tanstack/react-router';
import * as React from 'react';
import { RootProvider } from 'fumadocs-ui/provider/tanstack';

export const Route = createRootRoute({
  component: RootComponent,
});

function RootComponent() {
  return (
    <RootDocument>
      <Outlet />
    </RootDocument>
  );
}

function RootDocument({ children }: { children: React.ReactNode }) {
  return (
    <html suppressHydrationWarning>
      <head>
        <HeadContent />
      </head>
      <body className="flex flex-col min-h-screen">
        <RootProvider>{children}</RootProvider>
        <Scripts />
      </body>
    </html>
  );
}

Routes

Create the following files:

import defaultMdxComponents from 'fumadocs-ui/mdx';
import type { MDXComponents } from 'mdx/types';

export function getMDXComponents(components?: MDXComponents) {
  return {
    ...defaultMdxComponents,
    ...components,
  } satisfies MDXComponents;
}

export const useMDXComponents = getMDXComponents;

declare global {
  type MDXProvidedComponents = ReturnType<typeof getMDXComponents>;
}

The search route uses ZBSearch. See Document Search to configure it.

Finish

Start the dev server and write your docs in content/docs:

content/docs/index.mdx
---
title: Hello World
---

## Introduction

I love Fumadocs.

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