router-plugin

Development

TanStack Router bundler plugin for route generation and automatic code splitting. Supports Vite, Webpack, Rspack, and esbuild. Configures autoCodeSplitting, routesDirectory, target framework, and code split groupings.

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Router Plugin (`@tanstack/router-plugin`)

Bundler plugin that powers TanStack Router's file-based routing and automatic code splitting. Works with Vite, Webpack, Rspack, and esbuild via unplugin.

CRITICAL: The router plugin MUST come before the framework plugin (React, Solid, Vue) in the Vite config. Wrong order causes route generation and code splitting to fail silently.

Install

npm install -D @tanstack/router-plugin

Bundler Setup

Vite (most common)

// vite.config.ts
import { defineConfig } from 'vite'
import react from '@vitejs/plugin-react'
import { tanstackRouter } from '@tanstack/router-plugin/vite'

export default defineConfig({
  plugins: [
    // MUST come before react()
    tanstackRouter({
      target: 'react',
      autoCodeSplitting: true,
    }),
    react(),
  ],
})

Webpack

// webpack.config.js
const { tanstackRouter } = require('@tanstack/router-plugin/webpack')

module.exports = {
  plugins: [
    tanstackRouter({
      target: 'react',
      autoCodeSplitting: true,
    }),
  ],
}

Rspack

// rspack.config.js
const { tanstackRouter } = require('@tanstack/router-plugin/rspack')

module.exports = {
  plugins: [
    tanstackRouter({
      target: 'react',
      autoCodeSplitting: true,
    }),
  ],
}

esbuild

import { tanstackRouter } from '@tanstack/router-plugin/esbuild'
import esbuild from 'esbuild'

esbuild.build({
  plugins: [
    tanstackRouter({
      target: 'react',
      autoCodeSplitting: true,
    }),
  ],
})

Configuration Options

Core Options

Option	Type	Default	Description
`target`	`'react' \| 'solid' \| 'vue'`	`'react'`	Target framework
`routesDirectory`	`string`	`'./src/routes'`	Directory containing route files
`generatedRouteTree`	`string`	`'./src/routeTree.gen.ts'`	Path for generated route tree
`autoCodeSplitting`	`boolean`	`undefined`	Enable automatic code splitting
`enableRouteGeneration`	`boolean`	`true`	Set to `false` to disable route generation

File Convention Options

Option	Type	Default	Description
`routeFilePrefix`	`string`	`undefined`	Prefix filter for route files
`routeFileIgnorePrefix`	`string`	`'-'`	Prefix to exclude files from routing
`routeFileIgnorePattern`	`string`	`undefined`	Pattern to exclude from routing
`indexToken`	`string \| RegExp \| { regex: string; flags?: string }`	`'index'`	Token identifying index routes
`routeToken`	`string \| RegExp \| { regex: string; flags?: string }`	`'route'`	Token identifying route config files

Code Splitting Options

tanstackRouter({
  target: 'react',
  autoCodeSplitting: true,
  codeSplittingOptions: {
    // Default groupings for all routes
    defaultBehavior: [['component'], ['errorComponent'], ['notFoundComponent']],

    // Per-route custom splitting
    splitBehavior: ({ routeId }) => {
      if (routeId === '/dashboard') {
        // Keep loader and component together for dashboard
        return [['loader', 'component'], ['errorComponent']]
      }
      // Return undefined to use defaultBehavior
    },
  },
})

Output Options

Option	Type	Default	Description
`quoteStyle`	`'single' \| 'double'`	`'single'`	Quote style in generated code
`semicolons`	`boolean`	`false`	Use semicolons in generated code
`disableTypes`	`boolean`	`false`	Disable TypeScript types
`disableLogging`	`boolean`	`false`	Suppress plugin logs
`addExtensions`	`boolean \| string`	`false`	Add file extensions to imports
`enableRouteTreeFormatting`	`boolean`	`true`	Format generated route tree

Virtual Route Config

import { routes } from './routes'

tanstackRouter({
  target: 'react',
  virtualRouteConfig: routes, // or './routes.ts'
})

How It Works

The composed plugin assembles up to 3 sub-plugins:

Route Generator (always) — Watches route files and generates routeTree.gen.ts
Code Splitter (when autoCodeSplitting: true) — Splits route files into lazy-loaded chunks using virtual modules
HMR (dev mode, when code splitter is off) — Hot-reloads route changes without full refresh

Individual Plugin Exports

For advanced use, each sub-plugin is exported separately from the Vite entry:

import {
  tanstackRouter, // Composed (default)
  tanstackRouterGenerator, // Generator only
  tanStackRouterCodeSplitter, // Code splitter only
} from '@tanstack/router-plugin/vite'

Common Mistakes

1. CRITICAL: Wrong plugin order in Vite config

The router plugin must come before the framework plugin. Otherwise, route generation and code splitting fail silently.

// WRONG — react() before tanstackRouter()
plugins: [react(), tanstackRouter({ target: 'react' })]

// CORRECT — tanstackRouter() first
plugins: [tanstackRouter({ target: 'react' }), react()]

2. HIGH: Missing target option for non-React frameworks

The target defaults to 'react'. For Solid or Vue, you must set it explicitly.

// WRONG for Solid — generates React imports
tanstackRouter({ autoCodeSplitting: true })

// CORRECT for Solid
tanstackRouter({ target: 'solid', autoCodeSplitting: true })

3. MEDIUM: Confusing autoCodeSplitting with manual lazy routes

When autoCodeSplitting is enabled, the plugin handles splitting automatically. You do NOT need manual createLazyRoute or lazyRouteComponent calls — the plugin transforms your route files at build time.

// WRONG — manual lazy loading with autoCodeSplitting enabled
const LazyAbout = lazyRouteComponent(() => import('./about'))

// CORRECT — just write normal route files, plugin handles splitting
// src/routes/about.tsx
export const Route = createFileRoute('/about')({
  component: AboutPage,
})

function AboutPage() {
  return <h1>About</h1>
}

Cross-References

router-core/code-splitting — manual code splitting concepts
virtual-file-routes — programmatic route trees