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TanStack Vue Start provides SSR, streaming, server functions, API routes, and bundling powered by TanStack Router and Vite, ready to deploy to your favorite hosting provider.

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Installation

Install the Vue Start package: 
npm install @tanstack/vue-start

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Vite Plugin Setup

Configure the TanStack Start Vite plugin in your vite.config.ts: 
import { tanstackStart } from '@tanstack/vue-start/plugin/vite'
import { defineConfig } from 'vite'
import vue from '@vitejs/plugin-vue'

export default defineConfig({
  plugins: [
    tanstackStart({
      srcDirectory: 'src',
    }),
    vue(),
  ],
})

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Router Setup

Create your router instance in src/router.ts: 
import { createRouter } from '@tanstack/vue-router'
import { routeTree } from './routeTree.gen'

export function getRouter() {
  const router = createRouter({
    routeTree,
    defaultPreload: 'intent',
  })
  return router
}

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Server Functions

TanStack Vue Start provides server functions for executing code on the server with full type safety.

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Creating Server Functions

Use createServerFn to define server-side logic: 
import { createServerFn } from '@tanstack/vue-start'

const getUser = createServerFn()
  .handler(async () => {
    // This code runs only on the server
    const user = await db.user.findFirst()
    return user
  })

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Using Server Functions in Components

Call server functions using the useServerFn composable: 
<script setup>
import { useServerFn } from '@tanstack/vue-start'

const fetchUser = useServerFn(getUser)

const handleClick = async () => {
  const user = await fetchUser()
  console.log(user)
}
</script>

<template>
  <button @click="handleClick">Load User</button>
</template>
The useServerFn composable automatically handles:
  • Type-safe function calls
  • Redirect responses from server functions
  • Integration with TanStack Router navigation

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Middleware

Add middleware to server functions for shared logic like authentication, logging, or data validation.

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Creating Middleware

import { createMiddleware } from '@tanstack/vue-start'

const authMiddleware = createMiddleware()
  .server(async ({ next, context }) => {
    const user = await getSessionUser()
    
    if (!user) {
      throw new Error('Unauthorized')
    }
    
    return next({
      context: {
        user,
      },
    })
  })

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Using Middleware in Server Functions

const protectedAction = createServerFn()
  .middleware([authMiddleware])
  .handler(async ({ context }) => {
    // context.user is typed and available
    return { userId: context.user.id }
  })

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Input Validation

Validate server function inputs with validators like Zod, Valibot, or ArkType: 
import { createServerFn } from '@tanstack/vue-start'
import { z } from 'zod'

const updateUser = createServerFn()
  .inputValidator(z.object({
    name: z.string(),
    email: z.string().email(),
  }))
  .handler(async ({ data }) => {
    // data is fully typed based on the validator
    await db.user.update({
      where: { id: data.id },
      data: { name: data.name, email: data.email },
    })
  })

// Call with type-safe data
await updateUser({ 
  data: { 
    name: 'John', 
    email: '[email protected]' 
  } 
})

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HTTP Methods

Server functions support both GET and POST methods: 
// GET request (default)
const getData = createServerFn().handler(async () => {
  return { data: 'value' }
})

// POST request
const postData = createServerFn({ method: 'POST' })
  .handler(async ({ data }) => {
    return { success: true }
  })

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Client and Server Contexts

Share context between client and server: 
const contextMiddleware = createMiddleware()
  .client(async ({ next }) => {
    return next({
      sendContext: {
        clientTimestamp: Date.now(),
      },
    })
  })
  .server(async ({ context, next }) => {
    console.log('Client timestamp:', context.clientTimestamp)
    return next()
  })

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Package Exports

TanStack Vue Start provides several package exports:
  • @tanstack/vue-start - Main client exports
  • @tanstack/vue-start/server - Server-only utilities
  • @tanstack/vue-start/client - Client-only utilities
  • @tanstack/vue-start/plugin/vite - Vite plugin
  • @tanstack/vue-start/server-rpc - Server RPC utilities
  • @tanstack/vue-start/client-rpc - Client RPC utilities
  • @tanstack/vue-start/ssr-rpc - SSR RPC utilities

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Vue-Specific Features

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Composition API

Leverage Vue’s Composition API with server functions: 
<script setup>
import { ref, onMounted } from 'vue'
import { createServerFn } from '@tanstack/vue-start'

const fetchData = createServerFn().handler(async () => {
  return await db.getData()
})

const data = ref(null)
const loading = ref(true)

onMounted(async () => {
  data.value = await fetchData()
  loading.value = false
})
</script>

<template>
  <div v-if="loading">Loading...</div>
  <div v-else>{{ data }}</div>
</template>

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Suspense Support

Use Vue’s Suspense for async components: 
<template>
  <Suspense>
    <template #default>
      <AsyncContent />
    </template>
    <template #fallback>
      <div>Loading...</div>
    </template>
  </Suspense>
</template>

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Server-Side Rendering

Vue Start provides optimized SSR with automatic hydration: 
<script setup>
import { ref, onServerPrefetch } from 'vue'

const data = ref(null)

onServerPrefetch(async () => {
  data.value = await fetchServerData()
})
</script>

<template>
  <div>
    <h1>Server Rendered Content</h1>
    <div v-if="data">{{ data }}</div>
  </div>
</template>

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Reactive State

Combine reactive state with server functions: 
<script setup>
import { ref, computed, watch } from 'vue'
import { useServerFn } from '@tanstack/vue-start'

const userId = ref(1)
const fetchUser = useServerFn(getUser)
const user = ref(null)

watch(userId, async (newId) => {
  user.value = await fetchUser({ data: { id: newId } })
}, { immediate: true })

const userName = computed(() => user.value?.name || 'Unknown')
</script>

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TypeScript Configuration

Ensure your tsconfig.json includes: 
{
  "compilerOptions": {
    "jsx": "preserve",
    "module": "ESNext",
    "moduleResolution": "bundler",
    "target": "ES2022",
    "lib": ["ES2022", "DOM", "DOM.Iterable"],
    "strict": true,
    "types": ["vite/client"]
  }
}

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Peer Dependencies

TanStack Vue Start requires:
  • Vue >= 3.3.0
  • Vite >= 7.0.0

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Next Steps

Server Functions

Learn more about creating and using server functions

Routing

Explore TanStack Router features

Examples

Browse Vue Start examples

API Reference

View the complete API documentation

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