release v0.2.2

fix: auto-import `getQueryKey`

README.md

@@ -4,6 +4,17 @@
 
 End-to-end typesafe APIs with [tRPC.io](https://trpc.io/) in Nuxt applications.
 
+<p align="center">
+  <figure>
+    <img src="https://i.imgur.com/AjmNUxj.gif" alt="Demo" />
+    <figcaption>
+      <p align="center">
+        The client above is <strong>not</strong> importing any code from the server, only its type declarations.
+      </p>
+    </figcaption>
+  </figure>
+</p>
+
 ## Install
 
 ```bash
@@ -18,10 +29,10 @@ export default defineNuxtConfig({
   modules: ['trpc-nuxt'],
   trpc: {
     baseURL: 'http://localhost:3000', // defaults to http://localhost:3000
-    trpcURL: '/api/trpc', // defaults to /api/trpc
+    endpoint: '/trpc', // defaults to /trpc
   },
   typescript: {
-    strict: true // set this to true to make input/output types work
+    strict: true // required to make input/output types work
   }
 })
 ```
@@ -63,11 +74,9 @@ const client = useClient() // auto-imported
 
 const users = await client.query('getUsers')
 
-const addUser = async () => {
+const newUser = await client.mutation('createUser', {
-  const mutate = await client.mutation('createUser', {
+  name: 'wagmi'
-    name: 'wagmi'
+})
-  })
-}
 ```
 
 ## useAsyncQuery
@@ -86,13 +95,28 @@ const {
   refresh
 } = await useAsyncQuery(['getUser', { id: 69 }], {
   // pass useAsyncData options here
-  server: true
+  lazy: false
 })
 ```
 
+## useClientHeaders
+
+A composable that lets you add additional properties to pass to the tRPC Client. It uses `useStorage` from [@vueuse/core](https://vueuse.org/core/usestorage).
+
+```ts
+const headers = useClientHeaders()
+
+const { data: token } = await useAsyncQuery(['auth.login', { username, password }])
+
+headers.value.Authorization = `Bearer ${token}`
+
+// All client calls will now include the Authorization header.
+// For SSR, please follow this link https://github.com/trpc/trpc/discussions/1686
+```
+
 ## Options
 
-trpc-nuxt accepts the following options exposed under `~/server/trpc.index.ts`:
+trpc-nuxt accepts the following options exposed under `~/server/trpc/index.ts`:
 
 ```ts
 import * as trpc from '@trpc/server'
@@ -131,11 +155,17 @@ export const onError = (payload: OnErrorPayload<typeof router>) => {
 
 - [Validation](/recipes/validation.md)
 - [Authorization](/recipes/authorization.md)
+- [Merging Routers](/recipes/merging-routers.md)
 - [Error Handling](/recipes/error-handling.md)
 - [Error Formatting](/recipes/error-formatting.md)
+- [Inference Helpers](/recipes/inference-helpers.md)
 
 Learn more about tRPC.io [here](https://trpc.io/docs).
 
+## Recommended IDE Setup
+
+- [VS Code](https://code.visualstudio.com/) + [Volar](https://marketplace.visualstudio.com/items?itemName=Vue.volar)
+
 ## License
 
 MIT

package.json

@@ -1,11 +1,8 @@
 {
   "name": "trpc-nuxt",
   "type": "module",
-  "version": "0.1.0",
+  "version": "0.2.2",
-  "publishConfig": {
+  "packageManager": "pnpm@7.1.1",
-    "directory": "package"
-  },
-  "packageManager": "pnpm@7.1.0",
   "license": "MIT",
   "main": "./dist/module.cjs",
   "types": "./dist/types.d.ts",
@@ -24,26 +21,25 @@
     "dist",
     "*.d.ts"
   ],
-  "clean-publish": {
-    "withoutPublish": true,
-    "tempDir": "package"
-  },
   "scripts": {
-    "prepublishOnly": "rimraf ./package && nr build && clean-publish",
+    "prepublishOnly": "nr build",
-    "postpublish": "rimraf ./package",
     "build": "nuxt-module-build",
     "play": "nr build && nuxi dev playground",
+    "build:playground": "nuxi build playground",
     "lint": "eslint .",
     "lint:fix": "eslint . --fix",
     "release": "bumpp --commit --push --tag && pnpm publish",
     "prepare": "nuxi prepare playground"
   },
   "dependencies": {
-    "@nuxt/kit": "^3.0.0-rc.3",
+    "@nuxt/kit": "^3.0.0-rc.4",
-    "@trpc/client": "^9.23.3",
+    "@trpc/client": "^9.25.2",
-    "@trpc/server": "^9.23.2",
+    "@trpc/server": "^9.25.2",
-    "fs-extra": "^10.1.0",
+    "@vueuse/core": "^8.6.0",
-    "h3": "^0.7.8",
+    "@vueuse/nuxt": "^8.6.0",
+    "dedent": "^0.7.0",
+    "defu": "^6.0.0",
+    "h3": "^0.7.9",
     "pathe": "^0.3.0",
     "ufo": "^0.8.4"
   },
@@ -51,18 +47,18 @@
     "@antfu/eslint-config": "^0.23.1",
     "@antfu/ni": "^0.16.2",
     "@nuxt/module-builder": "latest",
-    "@types/fs-extra": "^9.0.13",
     "bumpp": "^7.1.1",
-    "clean-publish": "^4.0.0",
     "eslint": "^8.14.0",
-    "nuxt": "^3.0.0-rc.3",
+    "nuxt": "3.0.0-rc.4",
     "ohash": "^0.1.0",
-    "pnpm": "^7.1.0",
+    "pnpm": "^7.1.1",
-    "superjson": "^1.9.1",
     "trpc-nuxt": "workspace:*",
     "zod": "^3.16.0"
   },
   "eslintConfig": {
-    "extends": "@antfu"
+    "extends": "@antfu",
+    "rules": {
+      "no-console": "warn"
+    }
   }
 }

package/.gitignore

@@ -1,51 +0,0 @@
-# Dependencies
-node_modules
-
-# Logs
-*.log*
-
-# Temp directories
-.temp
-.tmp
-.cache
-
-# Yarn
-**/.yarn/cache
-**/.yarn/*state*
-
-# Generated dirs
-dist
-
-# Nuxt
-.nuxt
-.output
-.vercel_build_output
-.build-*
-.env
-.netlify
-
-# Env
-.env
-
-# Testing
-reports
-coverage
-*.lcov
-.nyc_output
-
-# VSCode
-.vscode
-
-# Intellij idea
-*.iml
-.idea
-
-# OSX
-.DS_Store
-.AppleDouble
-.LSOverride
-.AppleDB
-.AppleDesktop
-Network Trash Folder
-Temporary Items
-.apdisk

package/.npmrc

@@ -1,2 +0,0 @@
-ignore-workspace-root-check=true
-shamefully-hoist=true

package/LICENSE

@@ -1,21 +0,0 @@
-MIT License
-
-Copyright (c) 2022 Robert Soriano <https://github.com/wobsoriano>
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.

package/README.md

@@ -1,141 +0,0 @@
-# tRPC-Nuxt
-
-[![Version](https://img.shields.io/npm/v/trpc-nuxt?style=flat&colorA=000000&colorB=000000)](https://www.npmjs.com/package/trpc-nuxt)
-
-End-to-end typesafe APIs with [tRPC.io](https://trpc.io/) in Nuxt applications.
-
-## Install
-
-```bash
-npm i trpc-nuxt
-```
-
-```ts
-// nuxt.config.ts
-import { defineNuxtConfig } from 'nuxt'
-
-export default defineNuxtConfig({
-  modules: ['trpc-nuxt'],
-  trpc: {
-    baseURL: 'http://localhost:3000', // defaults to http://localhost:3000
-    trpcURL: '/api/trpc', // defaults to /api/trpc
-  },
-  typescript: {
-    strict: true // set this to true to make input/output types work
-  }
-})
-```
-
-## Usage
-
-Expose your tRPC [routes](https://trpc.io/docs/router) under `~/server/trpc/index.ts`:
-
-```ts
-// ~/server/trpc/index.ts
-import type { inferAsyncReturnType } from '@trpc/server'
-import * as trpc from '@trpc/server'
-import { z } from 'zod' //  yup/superstruct/zod/myzod/custom
-
-export const router = trpc.router()
-  // queries and mutations...
-  .query('getUsers', {
-    async resolve(req) {
-      // use your ORM of choice
-      return await UserModel.all()
-    },
-  })
-  .mutation('createUser', {
-    // validate input with Zod
-    input: z.object({ name: z.string().min(5) }),
-    async resolve(req) {
-      // use your ORM of choice
-      return await UserModel.create({
-        data: req.input,
-      })
-    },
-  })
-```
-
-Use the client like so:
-
-```ts
-const client = useClient() // auto-imported
-
-const users = await client.query('getUsers')
-
-const addUser = async () => {
-  const mutate = await client.mutation('createUser', {
-    name: 'wagmi'
-  })
-}
-```
-
-## useAsyncQuery
-
-A thin wrapper around [`useAsyncData`](https://v3.nuxtjs.org/api/composables/use-async-data/) and `client.query()`.
-
-The first argument is a `[path, input]`-tuple - if the `input` is optional, you can omit the, `input`-part.
-
-You'll notice that you get autocompletion on the `path` and automatic typesafety on the `input`.
-
-```ts
-const {
-  data,
-  pending,
-  error,
-  refresh
-} = await useAsyncQuery(['getUser', { id: 69 }], {
-  // pass useAsyncData options here
-  server: true
-})
-```
-
-## Options
-
-trpc-nuxt accepts the following options exposed under `~/server/trpc.index.ts`:
-
-```ts
-import * as trpc from '@trpc/server'
-import type { inferAsyncReturnType } from '@trpc/server'
-import type { CompatibilityEvent } from 'h3'
-import type { OnErrorPayload } from 'trpc-nuxt/api'
-
-export const router = trpc.router<inferAsyncReturnType<typeof createContext>>()
-
-// Optional
-// https://trpc.io/docs/context
-export const createContext = (event: CompatibilityEvent) => {
-  // ...
-  return {
-    /** context data */
-  }
-}
-
-// Optional
-// https://trpc.io/docs/caching#using-responsemeta--to-cache-responses
-export const responseMeta = () => {
-  // ...
-  return {
-    // { headers: ... }
-  }
-}
-
-// Optional
-// https://trpc.io/docs/error-handling#handling-errors
-export const onError = (payload: OnErrorPayload<typeof router>) => {
-  // Do whatever here like send to bug reporting and stuff
-}
-```
-
-## Recipes
-
-- [Validation](/recipes/validation.md)
-- [Authorization](/recipes/authorization.md)
-- [Error Handling](/recipes/error-handling.md)
-- [Error Formatting](/recipes/error-formatting.md)
-
-Learn more about tRPC.io [here](https://trpc.io/docs).
-
-## License
-
-MIT

package/api.d.ts

@@ -1 +0,0 @@
-export * from './dist/runtime/api'

package/package.json

@@ -1,39 +0,0 @@
-{
-  "name": "trpc-nuxt",
-  "type": "module",
-  "version": "0.0.3",
-  "publishConfig": {
-    "directory": "package"
-  },
-  "packageManager": "pnpm@7.1.0",
-  "license": "MIT",
-  "main": "./dist/module.cjs",
-  "types": "./dist/types.d.ts",
-  "exports": {
-    "./package.json": "./package.json",
-    ".": {
-      "import": "./dist/module.mjs",
-      "require": "./dist/module.cjs"
-    },
-    "./api": {
-      "import": "./dist/runtime/api.mjs",
-      "types": "./dist/runtime/api.d.ts"
-    }
-  },
-  "files": [
-    "dist",
-    "*.d.ts"
-  ],
-  "dependencies": {
-    "@nuxt/kit": "^3.0.0-rc.3",
-    "@trpc/client": "^9.23.3",
-    "@trpc/server": "^9.23.2",
-    "fs-extra": "^10.1.0",
-    "h3": "^0.7.8",
-    "pathe": "^0.3.0",
-    "ufo": "^0.8.4"
-  },
-  "scripts": {
-    "postpublish": "rimraf ./package"
-  }
-}

package/playground/.gitignore

@@ -1,7 +0,0 @@
-node_modules
-*.log*
-.nuxt
-.nitro
-.cache
-.output
-.env

package/playground/README.md

@@ -1,31 +0,0 @@
-# dev playground
-
-## Setup
-
-Make sure to install the dependencies:
-
-```bash
-pnpm install
-```
-
-## Development Server
-
-Start the development server on http://localhost:3000
-
-```bash
-pnpm dev
-```
-
-## Production
-
-Build the application for production:
-
-```bash
-pnpm build
-```
-
-Locally preview production build:
-
-```bash
-pnpm preview
-```

package/playground/app.vue

@@ -1,18 +0,0 @@
-<script setup lang="ts">
-const { data, error } = await useAsyncQuery(['getUser', { username: 'jcena' }], {
-  lazy: true,
-})
-
-const client = useClient()
-</script>
-
-<template>
-  <div>
-    <div v-if="data">
-      {{ JSON.stringify(data, null, 2) }}
-    </div>
-    <div v-else-if="error">
-      asdx  {{ JSON.stringify(error, null, 2) }}
-    </div>
-  </div>
-</template>

package/playground/nuxt.config.ts

@@ -1,13 +0,0 @@
-import { defineNuxtConfig } from 'nuxt'
-import Module from '..'
-
-// https://v3.nuxtjs.org/api/configuration/nuxt.config
-export default defineNuxtConfig({
-  modules: [Module],
-  runtimeConfig: {
-    baseURL: 'http://localhost:3000',
-  },
-  typescript: {
-    strict: true,
-  },
-})

package/playground/package.json

@@ -1,4 +0,0 @@
-{
-  "name": "playground",
-  "private": true
-}

package/playground/server/trpc/index.ts

@@ -1,82 +0,0 @@
-// ~/server/trpc/index.ts
-import { ZodError, z } from 'zod'
-import * as trpc from '@trpc/server'
-import type { inferAsyncReturnType } from '@trpc/server'
-import type { CompatibilityEvent } from 'h3'
-import type { ResponseMetaFnPayload } from 'trpc-nuxt/api'
-// import superjson from 'superjson'
-
-const fakeUsers = [
-  { id: 1, username: 'jcena' },
-  { id: 2, username: 'dbatista' },
-  { id: 3, username: 'jbiden' },
-]
-
-export const router = trpc
-  .router<inferAsyncReturnType<typeof createContext>>()
-  .formatError(({ shape, error }) => {
-    return {
-      ...shape,
-      data: {
-        ...shape.data,
-        zodError:
-          error.code === 'BAD_REQUEST'
-          && error.cause instanceof ZodError
-            ? error.cause.flatten()
-            : null,
-      },
-    }
-  })
-  .query('getUsers', {
-    resolve() {
-      return fakeUsers
-    },
-  })
-  .query('getUser', {
-    // validate input with Zod
-    input: z.object({
-      username: z.string().min(5),
-    }),
-    resolve(req) {
-      return fakeUsers.find(i => i.username === req.input.username) ?? null
-    },
-  })
-  .mutation('createUser', {
-    input: z.object({ username: z.string().min(5) }),
-    resolve(req) {
-      const newUser = {
-        id: fakeUsers.length + 1,
-        username: req.input.username,
-      }
-      fakeUsers.push(newUser)
-      return newUser
-    },
-  })
-
-export const createContext = (event: CompatibilityEvent) => {
-  event.res.setHeader('x-ssr', 1)
-  return {}
-}
-
-export const responseMeta = (opts: ResponseMetaFnPayload<any>) => {
-  // const nuxtApp = useNuxtApp()
-  // const client = useClient()
-  // console.log(opts)
-
-  // if (nuxtApp.nuxtState) {
-  //   nuxtApp.nuxtState.trpc = client.runtime.transformer.serialize({
-  //     ctx: opts.ctx,
-  //     errors: opts.errors,
-  //   })
-  // }
-  // else {
-  //   nuxtApp.nuxtState = {
-  //     trpc: client.runtime.transformer.serialize({
-  //       ctx: opts.ctx,
-  //       errors: opts.errors,
-  //     }),
-  //   }
-  // }
-
-  return {}
-}

package/pnpm-workspace.yaml

@@ -1,2 +0,0 @@
-packages:
-  - playground/*

package/recipes/authorization.md

@@ -1,102 +0,0 @@
-## Authorization
-
-The `createContext`-function is called for each incoming request so here you can add contextual information about the calling user from the request object.
-
-### Create context from request headers
-
-```ts
-// ~/server/trpc/index.ts
-import type { inferAsyncReturnType } from '@trpc/server'
-import type { CompatibilityEvent } from 'h3'
-import { decodeAndVerifyJwtToken } from '~/somewhere/in/your/app/utils'
-
-// The app's context - is generated for each incoming request
-export async function createContext({ req }: CompatibilityEvent) {
-  // Create your context based on the request object
-  // Will be available as `ctx` in all your resolvers
-
-  // This is just an example of something you'd might want to do in your ctx fn
-  async function getUserFromHeader() {
-    if (req.headers.authorization) {
-      const user = await decodeAndVerifyJwtToken(req.headers.authorization.split(' ')[1])
-      return user
-    }
-    return null
-  }
-  const user = await getUserFromHeader()
-
-  return {
-    user,
-  }
-}
-
-type Context = inferAsyncReturnType<typeof createContext>
-
-// [..] Define API handler and app router
-```
-
-### Option 1: Authorize using resolver
-
-```ts
-import { TRPCError } from '@trpc/server'
-
-export const router = trpc
-  .router<Context>()
-  // open for anyone
-  .query('hello', {
-    input: z.string().nullish(),
-    resolve: ({ input, ctx }) => {
-      return `hello ${input ?? ctx.user?.name ?? 'world'}`
-    },
-  })
-  // checked in resolver
-  .query('secret', {
-    resolve: ({ ctx }) => {
-      if (!ctx.user)
-        throw new TRPCError({ code: 'UNAUTHORIZED' })
-
-      return {
-        secret: 'sauce',
-      }
-    },
-  })
-```
-
-### Option 2: Authorize using middleware
-
-```ts
-import * as trpc from '@trpc/server'
-import { TRPCError } from '@trpc/server'
-
-// Merging routers: https://trpc.io/docs/merging-routers
-
-export const router = trpc
-  .router<Context>()
-  // this is accessible for everyone
-  .query('hello', {
-    input: z.string().nullish(),
-    resolve: ({ input, ctx }) => {
-      return `hello ${input ?? ctx.user?.name ?? 'world'}`
-    },
-  })
-  .merge(
-    'admin.',
-    trpc.router<Context>()
-      // this protects all procedures defined next in this router
-      .middleware(async ({ ctx, next }) => {
-        if (!ctx.user?.isAdmin)
-          throw new TRPCError({ code: 'UNAUTHORIZED' })
-
-        return next()
-      })
-      .query('secret', {
-        resolve: ({ ctx }) => {
-          return {
-            secret: 'sauce',
-          }
-        },
-      }),
-  )
-```
-
-Learn more about authorization [here](https://trpc.io/docs/authorization).

package/recipes/error-formatting.md

@@ -1,41 +0,0 @@
-## Error Formatting
-
-The error formatting in your router will be inferred all the way to your client (& Vue components).
-
-### Adding custom formatting
-
-```ts
-// ~/server/trpc/index.ts
-import * as trpc from '@trpc/server'
-
-export const router = trpc.router<Context>()
-  .formatError(({ shape, error }) => {
-    return {
-      ...shape,
-      data: {
-        ...shape.data,
-        zodError:
-          error.code === 'BAD_REQUEST'
-          && error.cause instanceof ZodError
-            ? error.cause.flatten()
-            : null,
-      }
-    }
-  })
-```
-
-### Usage in Vue
-
-```html
-<script setup lang="ts">
-const { error } = await useAsyncQuery(['getUser', { id: 69 }])
-</script>
-
-<template>
-  <pre v-if="error?.data?.zodError">
-    {{ JSON.stringify(error.data.zodError, null, 2) }}
-  </pre>
-</template>
-```
-
-Learn more about error formatting [here](https://trpc.io/docs/error-formatting).

package/recipes/error-handling.md

@@ -1,15 +0,0 @@
-## Handling errors
-
-All errors that occur in a procedure go through the `onError` method before being sent to the client. Here you can handle or change errors.
-
-```ts
-// ~/server/trpc/index.ts
-import * as trpc from '@trpc/server'
-
-export function onError({ error, type, path, input, ctx, req }) {
-  console.error('Error:', error)
-  if (error.code === 'INTERNAL_SERVER_ERROR') {
-    // send to bug reporting
-  }
-}
-```

package/recipes/validation.md

@@ -1,49 +0,0 @@
-## Validation
-
-tRPC works out-of-the-box with yup/superstruct/zod/myzod/custom validators.
-
-### Input Validation
-
-```ts
-// ~/server/trpc/index.ts
-import { z } from 'zod'
-
-export const router = trpc
-  .router()
-  .mutation('createUser', {
-    // validate input with Zod
-    input: z.object({
-      name: z.string().min(5)
-    }),
-    async resolve(req) {
-      // use your ORM of choice
-      return await UserModel.create({
-        data: req.input,
-      })
-    },
-  })
-```
-
-### Output Validation
-
-```ts
-// ~/server/trpc/index.ts
-import { z } from 'zod'
-
-export const router = trpc
-  .router()
-  .query('hello', {
-    // validate output with Zod
-    output: z.object({
-      greeting: z.string()
-    }),
-    // expects return type of { greeting: string }
-    resolve() {
-      return {
-        greeting: 'hello!',
-      }
-    },
-  })
-```
-
-Learn more about input validation [here](https://trpc.io/docs/router#input-validation).

package/src/module.ts

@@ -1,61 +0,0 @@
-import { fileURLToPath } from 'url'
-import { dirname, join } from 'pathe'
-
-import { addServerHandler, defineNuxtModule } from '@nuxt/kit'
-import fs from 'fs-extra'
-
-export interface ModuleOptions {
-  baseURL: string
-  trpcURL: string
-}
-
-export default defineNuxtModule<ModuleOptions>({
-  meta: {
-    name: 'trpc-nuxt',
-    configKey: 'trpc',
-  },
-  defaults: {
-    baseURL: 'http://localhost:3000',
-    trpcURL: '/api/trpc',
-  },
-  async setup(options, nuxt) {
-    const runtimeDir = fileURLToPath(new URL('./runtime', import.meta.url))
-    nuxt.options.build.transpile.push(runtimeDir)
-
-    const clientPath = join(nuxt.options.buildDir, 'trpc-client.ts')
-    const handlerPath = join(nuxt.options.buildDir, 'trpc-handler.ts')
-
-    addServerHandler({
-      route: `${options.trpcURL}/*`,
-      handler: handlerPath,
-    })
-
-    nuxt.hook('autoImports:extend', (imports) => {
-      imports.push(
-        { name: 'useClient', from: clientPath },
-        { name: 'useAsyncQuery', from: join(runtimeDir, 'client') },
-      )
-    })
-
-    await fs.ensureDir(dirname(clientPath))
-
-    await fs.writeFile(clientPath, `
-      import * as trpc from '@trpc/client'
-      import type { router } from '~/server/trpc'
-
-      const client = trpc.createTRPCClient<typeof router>({
-        url: '${options.baseURL}${options.trpcURL}',
-      })
-    
-      export const useClient = () => client
-    `)
-
-    await fs.writeFile(handlerPath, `
-      import { createTRPCHandler } from 'trpc-nuxt/api'
-      import * as functions from '~/server/trpc'
-
-      export default createTRPCHandler(functions)
-    `)
-  },
-})
-

package/src/runtime/api.ts

@@ -1,92 +0,0 @@
-import { resolveHTTPResponse } from '@trpc/server'
-import type {
-  AnyRouter,
-  ProcedureType,
-  ResponseMeta,
-  TRPCError,
-  inferRouterContext,
-  inferRouterError,
-} from '@trpc/server'
-import { createURL } from 'ufo'
-import type { CompatibilityEvent } from 'h3'
-import { defineEventHandler, isMethod, useBody } from 'h3'
-import type { TRPCResponse } from '@trpc/server/dist/declarations/src/rpc'
-
-type MaybePromise<T> = T | Promise<T>
-
-export type CreateContextFn<TRouter extends AnyRouter> = (event: CompatibilityEvent) => MaybePromise<inferRouterContext<TRouter>>
-
-export interface ResponseMetaFnPayload<TRouter extends AnyRouter> {
-  data: TRPCResponse<unknown, inferRouterError<TRouter>>[]
-  ctx?: inferRouterContext<TRouter>
-  paths?: string[]
-  type: ProcedureType | 'unknown'
-  errors: TRPCError[]
-}
-
-export type ResponseMetaFn<TRouter extends AnyRouter> = (opts: ResponseMetaFnPayload<TRouter>) => ResponseMeta
-
-export interface OnErrorPayload<TRouter extends AnyRouter> {
-  error: TRPCError
-  type: ProcedureType | 'unknown'
-  path: string | undefined
-  req: CompatibilityEvent['req']
-  input: unknown
-  ctx: undefined | inferRouterContext<TRouter>
-}
-
-export type OnErrorFn<TRouter extends AnyRouter> = (opts: OnErrorPayload<TRouter>) => void
-
-export function createTRPCHandler<Router extends AnyRouter>({
-  router,
-  createContext,
-  responseMeta,
-  onError,
-}: {
-  router: Router
-  createContext?: CreateContextFn<Router>
-  responseMeta?: ResponseMetaFn<Router>
-  onError?: OnErrorFn<Router>
-}) {
-  const url = '/api/trpc'
-
-  return defineEventHandler(async (event) => {
-    const {
-      req,
-      res,
-    } = event
-
-    const $url = createURL(req.url)
-
-    event.context.hello = 'world'
-
-    const httpResponse = await resolveHTTPResponse({
-      router,
-      req: {
-        method: req.method,
-        headers: req.headers,
-        body: isMethod(event, 'GET') ? null : await useBody(event),
-        query: $url.searchParams,
-      },
-      path: $url.pathname.substring(url.length + 1),
-      createContext: async () => createContext?.(event),
-      responseMeta,
-      onError: (o) => {
-        onError?.({
-          ...o,
-          req,
-        })
-      },
-    })
-
-    const { status, headers, body } = httpResponse
-
-    res.statusCode = status
-
-    Object.keys(headers).forEach((key) => {
-      res.setHeader(key, headers[key])
-    })
-
-    return body
-  })
-}

package/src/runtime/client.ts

@@ -1,64 +0,0 @@
-import type {
-  AsyncData,
-  AsyncDataOptions,
-  KeyOfRes,
-  PickFrom,
-  _Transform,
-} from 'nuxt/dist/app/composables/asyncData'
-import type { ProcedureRecord, inferHandlerInput, inferProcedureInput, inferProcedureOutput } from '@trpc/server'
-import type { TRPCClientErrorLike } from '@trpc/client'
-import { objectHash } from 'ohash'
-// @ts-expect-error: Resolved by Nuxt
-import { useAsyncData, useState } from '#imports'
-// @ts-expect-error: Resolved by Nuxt
-import { useClient } from '#build/trpc-client'
-// @ts-expect-error: Resolved by Nuxt
-import type { router } from '~/server/trpc'
-
-type AppRouter = typeof router
-
-type inferProcedures<
-  TObj extends ProcedureRecord<any, any, any, any, any, any>,
-> = {
-  [TPath in keyof TObj]: {
-    input: inferProcedureInput<TObj[TPath]>
-    output: inferProcedureOutput<TObj[TPath]>
-  };
-}
-
-type TQueries = AppRouter['_def']['queries']
-type TError = TRPCClientErrorLike<AppRouter>
-
-type TQueryValues = inferProcedures<AppRouter['_def']['queries']>
-
-export async function useAsyncQuery<
-  TPath extends keyof TQueryValues & string,
-  TOutput extends TQueryValues[TPath]['output'] = TQueryValues[TPath]['output'],
-  Transform extends _Transform<TOutput> = _Transform<TOutput, TOutput>,
-  PickKeys extends KeyOfRes<Transform> = KeyOfRes<Transform>,
->(
-  pathAndInput: [path: TPath, ...args: inferHandlerInput<TQueries[TPath]>],
-  options: AsyncDataOptions<TOutput, Transform, PickKeys> = {},
-): Promise<AsyncData<PickFrom<ReturnType<Transform>, PickKeys>, TError>> {
-  const client = useClient()
-  const key = `${pathAndInput[0]}-${objectHash(pathAndInput[1] ? JSON.stringify(pathAndInput[1]) : '')}`
-  const serverError = useState<TError | null>(`error-${key}`, () => null)
-  const { error, data, ...rest } = await useAsyncData(
-    key,
-    () => client.query(...pathAndInput),
-    options,
-  )
-
-  // @ts-expect-error: Resolved by Nuxt
-  if (process.server && error.value && !serverError.value)
-    serverError.value = error.value as any
-
-  if (data.value)
-    serverError.value = null
-
-  return {
-    ...rest,
-    data,
-    error: serverError,
-  } as any
-}

package/tsconfig.json

@@ -1,3 +0,0 @@
-{
-  "extends": "./playground/.nuxt/tsconfig.json"
-}

playground/app.vue

@@ -1,18 +1,5 @@
-<script setup lang="ts">
-const { data, error } = await useAsyncQuery(['getUser', { username: 'jcena' }], {
-  lazy: true,
-})
-
-const client = useClient()
-</script>
-
 <template>
   <div>
-    <div v-if="data">
+    <NuxtPage />
-      {{ JSON.stringify(data, null, 2) }}
-    </div>
-    <div v-else-if="error">
-      asdx  {{ JSON.stringify(error, null, 2) }}
-    </div>
   </div>
 </template>

playground/nuxt.config.ts

@@ -1,5 +1,5 @@
 import { defineNuxtConfig } from 'nuxt'
-import Module from '..'
+import Module from '../src/module'
 
 // https://v3.nuxtjs.org/api/configuration/nuxt.config
 export default defineNuxtConfig({

playground/pages/cookie.vue

@@ -0,0 +1,19 @@
+<script setup lang="ts">
+const counter = useCookie('counter')
+counter.value = counter.value || Math.round(Math.random() * 1000)
+</script>
+
+<template>
+  <div>
+    <h1> Counter: {{ counter || '-' }}</h1>
+    <button @click="counter = null">
+      reset
+    </button>
+    <button @click="counter--">
+      -
+    </button>
+    <button @click="counter++">
+      +
+    </button>
+  </div>
+</template>

playground/pages/index.vue

@@ -0,0 +1,64 @@
+<script setup lang="ts">
+const client = useClient()
+const headers = useClientHeaders()
+const { data: todos, pending, error, refresh } = await useAsyncQuery(['getTodos'])
+
+const addHeader = () => {
+  // headers.value.cookie = 'counter=69'
+  console.log(headers.value)
+}
+
+const addTodo = async () => {
+  const title = Math.random().toString(36).slice(2, 7)
+
+  try {
+    const result = await client.mutation('addTodo', {
+      id: Date.now(),
+      userId: 69,
+      title,
+      completed: false,
+    })
+    console.log('Todo: ', result)
+  }
+  catch (e) {
+    console.log(e)
+  }
+}
+</script>
+
+<template>
+  <div v-if="pending">
+    Loading...
+  </div>
+  <div v-else-if="error?.data?.code">
+    Error: {{ error.data.code }}
+  </div>
+  <div v-else-if="todos">
+    <ul>
+      <li v-for="t in todos.slice(0, 10)" :key="t.id">
+        <NuxtLink :class="{ completed: t.completed }" :to="`/todo/${t.id}`">
+          Title: {{ t.title }}
+        </NuxtLink>
+      </li>
+    </ul>
+    <button @click="addTodo">
+      Add Todo
+    </button>
+    <button @click="() => refresh()">
+      Refresh
+    </button>
+    <button @click="addHeader">
+      Add header
+    </button>
+  </div>
+</template>
+
+<style>
+a {
+  text-decoration: none;
+}
+
+.completed {
+  text-decoration: line-through;
+}
+</style>

playground/pages/todo/[id].vue

@@ -0,0 +1,18 @@
+<script setup lang="ts">
+const route = useRoute()
+const { data: todo, pending, error } = await useAsyncQuery(['getTodo', Number(route.params.id)])
+</script>
+
+<template>
+  <div v-if="pending">
+    Loading...
+  </div>
+  <div v-else-if="error?.data?.code">
+    {{ error.data.code }}
+  </div>
+  <div v-else>
+    ID: {{ todo.id }} <br>
+    Title: {{ todo.title }} <br>
+    Completed: {{ todo.completed }}
+  </div>
+</template>

playground/server/trpc/index.ts

@@ -1,82 +1,53 @@
-// ~/server/trpc/index.ts
-import { ZodError, z } from 'zod'
 import * as trpc from '@trpc/server'
 import type { inferAsyncReturnType } from '@trpc/server'
+import { z } from 'zod'
 import type { CompatibilityEvent } from 'h3'
-import type { ResponseMetaFnPayload } from 'trpc-nuxt/api'
-// import superjson from 'superjson'
 
-const fakeUsers = [
+const baseURL = 'https://jsonplaceholder.typicode.com'
-  { id: 1, username: 'jcena' },
-  { id: 2, username: 'dbatista' },
-  { id: 3, username: 'jbiden' },
-]
 
-export const router = trpc
+const TodoShape = z.object({
-  .router<inferAsyncReturnType<typeof createContext>>()
+  userId: z.number(),
-  .formatError(({ shape, error }) => {
+  id: z.number(),
-    return {
+  title: z.string(),
-      ...shape,
+  completed: z.boolean(),
-      data: {
+})
-        ...shape.data,
+
-        zodError:
+export type Todo = z.infer<typeof TodoShape>
-          error.code === 'BAD_REQUEST'
+
-          && error.cause instanceof ZodError
+export const router = trpc.router<Context>()
-            ? error.cause.flatten()
+  .query('getTodos', {
-            : null,
+    async resolve() {
-      },
+      return await $fetch<Todo[]>(`${baseURL}/todos`)
-    }
-  })
-  .query('getUsers', {
-    resolve() {
-      return fakeUsers
     },
   })
-  .query('getUser', {
+  .query('getTodo', {
-    // validate input with Zod
+    input: z.number(),
-    input: z.object({
+    async resolve(req) {
-      username: z.string().min(5),
+      return await $fetch<Todo>(`${baseURL}/todos/${req.input}`)
-    }),
-    resolve(req) {
-      return fakeUsers.find(i => i.username === req.input.username) ?? null
     },
   })
-  .mutation('createUser', {
+  .mutation('addTodo', {
-    input: z.object({ username: z.string().min(5) }),
+    input: TodoShape,
-    resolve(req) {
+    async resolve(req) {
-      const newUser = {
+      console.log(req.input)
-        id: fakeUsers.length + 1,
+      return await $fetch<Todo>(`${baseURL}/todos`, {
-        username: req.input.username,
+        method: 'POST',
-      }
+        body: req.input,
-      fakeUsers.push(newUser)
+      })
-      return newUser
     },
   })
 
-export const createContext = (event: CompatibilityEvent) => {
+export async function createContext(event: CompatibilityEvent) {
-  event.res.setHeader('x-ssr', 1)
+  // Create your context based on the request object
-  return {}
+  // Will be available as `ctx` in all your resolvers
+
+  // This is just an example of something you'd might want to do in your ctx fn
+  // const x = useCookies(event)
+  console.log(event.req.headers)
+
+  return {
+
+  }
 }
 
-export const responseMeta = (opts: ResponseMetaFnPayload<any>) => {
+  type Context = inferAsyncReturnType<typeof createContext>
-  // const nuxtApp = useNuxtApp()
-  // const client = useClient()
-  // console.log(opts)
-
-  // if (nuxtApp.nuxtState) {
-  //   nuxtApp.nuxtState.trpc = client.runtime.transformer.serialize({
-  //     ctx: opts.ctx,
-  //     errors: opts.errors,
-  //   })
-  // }
-  // else {
-  //   nuxtApp.nuxtState = {
-  //     trpc: client.runtime.transformer.serialize({
-  //       ctx: opts.ctx,
-  //       errors: opts.errors,
-  //     }),
-  //   }
-  // }
-
-  return {}
-}

recipes/inference-helpers.md

@@ -0,0 +1,80 @@
+## Inference Helpers
+
+`@trpc/server` exports the following helper types to assist with inferring these types from the `router` exported in `~/server/trpc/index.ts`:
+
+- `inferProcedureOutput<TProcedure>`
+- `inferProcedureInput<TProcedure>`
+- `inferSubscriptionOutput<TRouter, TPath>`
+
+```ts
+// ~/utils/trpc.ts
+import type { router } from '~/server/trpc/index.ts'
+
+type AppRouter = typeof router
+
+/**
+ * Enum containing all api query paths
+ */
+export type TQuery = keyof AppRouter['_def']['queries']
+
+/**
+ * Enum containing all api mutation paths
+ */
+export type TMutation = keyof AppRouter['_def']['mutations']
+
+/**
+ * Enum containing all api subscription paths
+ */
+export type TSubscription = keyof AppRouter['_def']['subscriptions']
+
+/**
+ * This is a helper method to infer the output of a query resolver
+ * @example type HelloOutput = InferQueryOutput<'hello'>
+ */
+export type InferQueryOutput<TRouteKey extends TQuery> = inferProcedureOutput<
+  AppRouter['_def']['queries'][TRouteKey]
+>
+
+/**
+ * This is a helper method to infer the input of a query resolver
+ * @example type HelloInput = InferQueryInput<'hello'>
+ */
+export type InferQueryInput<TRouteKey extends TQuery> = inferProcedureInput<
+  AppRouter['_def']['queries'][TRouteKey]
+>
+
+/**
+ * This is a helper method to infer the output of a mutation resolver
+ * @example type HelloOutput = InferMutationOutput<'hello'>
+ */
+export type InferMutationOutput<TRouteKey extends TMutation> =
+  inferProcedureOutput<AppRouter['_def']['mutations'][TRouteKey]>
+
+/**
+ * This is a helper method to infer the input of a mutation resolver
+ * @example type HelloInput = InferMutationInput<'hello'>
+ */
+export type InferMutationInput<TRouteKey extends TMutation> =
+  inferProcedureInput<AppRouter['_def']['mutations'][TRouteKey]>
+
+/**
+ * This is a helper method to infer the output of a subscription resolver
+ * @example type HelloOutput = InferSubscriptionOutput<'hello'>
+ */
+export type InferSubscriptionOutput<TRouteKey extends TSubscription> =
+  inferProcedureOutput<AppRouter['_def']['subscriptions'][TRouteKey]>
+
+/**
+ * This is a helper method to infer the asynchronous output of a subscription resolver
+ * @example type HelloAsyncOutput = InferAsyncSubscriptionOutput<'hello'>
+ */
+export type InferAsyncSubscriptionOutput<TRouteKey extends TSubscription> =
+  inferSubscriptionOutput<AppRouter, TRouteKey>
+
+/**
+ * This is a helper method to infer the input of a subscription resolver
+ * @example type HelloInput = InferSubscriptionInput<'hello'>
+ */
+export type InferSubscriptionInput<TRouteKey extends TSubscription> =
+  inferProcedureInput<AppRouter['_def']['subscriptions'][TRouteKey]>
+```

recipes/merging-routers.md

@@ -0,0 +1,46 @@
+# Merging Routers
+
+Writing all API-code in your code in the same file is not a great idea. It's easy to merge routers with other routers.
+
+Define your routes:
+
+```ts
+// ~/server/trpc/routes/posts.ts
+export const posts = trpc.router()
+  .query('list', {
+    resolve() {
+      // ..
+      return []
+    }
+  })
+```
+
+```ts
+// ~/server/trpc/routes/users.ts
+export const users = trpc.router()
+  .query('list', {
+    resolve() {
+      // ..
+      return []
+    }
+  })
+```
+
+```ts
+// ~/server/trpc/index.ts
+import { users } from './routes/users'
+import { posts } from './routes/posts'
+
+export const router = trpc.router()
+  .merge('user.', users) // prefix user procedures with "user."
+  .merge('post.', posts) // prefix post procedures with "post."
+```
+
+and use it like this:
+
+```html
+<script setup lang="ts">
+const { data: users } = await useAsyncQuery(['user.list'])
+const { data: posts } = await useAsyncQuery(['post.list'])
+</script>
+```

src/module.ts

@@ -1,12 +1,14 @@
 import { fileURLToPath } from 'url'
-import { dirname, join } from 'pathe'
+import { join, resolve } from 'pathe'
+import { defu } from 'defu'
+// @ts-expect-error: No types
+import dedent from 'dedent'
 
-import { addServerHandler, defineNuxtModule } from '@nuxt/kit'
+import { addAutoImport, addPlugin, addServerHandler, addTemplate, defineNuxtModule } from '@nuxt/kit'
-import fs from 'fs-extra'
 
 export interface ModuleOptions {
   baseURL: string
-  trpcURL: string
+  endpoint: string
 }
 
 export default defineNuxtModule<ModuleOptions>({
@@ -16,46 +18,53 @@ export default defineNuxtModule<ModuleOptions>({
   },
   defaults: {
     baseURL: 'http://localhost:3000',
-    trpcURL: '/api/trpc',
+    endpoint: '/trpc',
   },
   async setup(options, nuxt) {
     const runtimeDir = fileURLToPath(new URL('./runtime', import.meta.url))
-    nuxt.options.build.transpile.push(runtimeDir)
+    nuxt.options.build.transpile.push(runtimeDir, '#build/trpc-handler')
 
-    const clientPath = join(nuxt.options.buildDir, 'trpc-client.ts')
     const handlerPath = join(nuxt.options.buildDir, 'trpc-handler.ts')
+    const trpcOptionsPath = join(nuxt.options.srcDir, 'server/trpc')
+
+    // Add vueuse
+    nuxt.options.modules.push('@vueuse/nuxt')
+
+    // Final resolved configuration
+    const finalConfig = nuxt.options.runtimeConfig.public.trpc = defu(nuxt.options.runtimeConfig.public.trpc, {
+      baseURL: options.baseURL,
+      endpoint: options.endpoint,
+    })
+
+    addAutoImport([
+      { name: 'useClient', from: join(runtimeDir, 'client') },
+      { name: 'useAsyncQuery', from: join(runtimeDir, 'client') },
+      { name: 'useClientHeaders', from: join(runtimeDir, 'client') },
+      { name: 'getQueryKey', from: join(runtimeDir, 'client') },
+    ])
 
     addServerHandler({
-      route: `${options.trpcURL}/*`,
+      route: `${finalConfig.endpoint}/*`,
       handler: handlerPath,
     })
 
-    nuxt.hook('autoImports:extend', (imports) => {
+    addPlugin(resolve(runtimeDir, 'plugin'))
-      imports.push(
-        { name: 'useClient', from: clientPath },
-        { name: 'useAsyncQuery', from: join(runtimeDir, 'client') },
-      )
-    })
 
-    await fs.ensureDir(dirname(clientPath))
+    addTemplate({
-
+      filename: 'trpc-handler.ts',
-    await fs.writeFile(clientPath, `
+      write: true,
-      import * as trpc from '@trpc/client'
+      getContents() {
-      import type { router } from '~/server/trpc'
+        return dedent`
-
+          import { createTRPCHandler } from 'trpc-nuxt/api'
-      const client = trpc.createTRPCClient<typeof router>({
+          import * as functions from '${trpcOptionsPath}'
-        url: '${options.baseURL}${options.trpcURL}',
-      })
     
-      export const useClient = () => client
+          export default createTRPCHandler({
-    `)
+            ...functions,
-
+            endpoint: '${finalConfig.endpoint}'
-    await fs.writeFile(handlerPath, `
+          })
-      import { createTRPCHandler } from 'trpc-nuxt/api'
+        `
-      import * as functions from '~/server/trpc'
+      },
-
+    })
-      export default createTRPCHandler(functions)
-    `)
   },
 })
 

src/runtime/api.ts

@@ -42,33 +42,31 @@ export function createTRPCHandler<Router extends AnyRouter>({
   createContext,
   responseMeta,
   onError,
+  endpoint,
 }: {
   router: Router
   createContext?: CreateContextFn<Router>
   responseMeta?: ResponseMetaFn<Router>
   onError?: OnErrorFn<Router>
+  endpoint: string
 }) {
-  const url = '/api/trpc'
-
   return defineEventHandler(async (event) => {
     const {
       req,
       res,
     } = event
 
-    const $url = createURL(req.url)
+    const $url = createURL(req.url!)
-
-    event.context.hello = 'world'
 
     const httpResponse = await resolveHTTPResponse({
       router,
       req: {
-        method: req.method,
+        method: req.method!,
         headers: req.headers,
         body: isMethod(event, 'GET') ? null : await useBody(event),
         query: $url.searchParams,
       },
-      path: $url.pathname.substring(url.length + 1),
+      path: $url.pathname.substring(endpoint.length + 1),
       createContext: async () => createContext?.(event),
       responseMeta,
       onError: (o) => {
@@ -83,8 +81,8 @@ export function createTRPCHandler<Router extends AnyRouter>({
 
     res.statusCode = status
 
-    Object.keys(headers).forEach((key) => {
+    headers && Object.keys(headers).forEach((key) => {
-      res.setHeader(key, headers[key])
+      res.setHeader(key, headers[key]!)
     })
 
     return body

src/runtime/client.ts

@@ -6,18 +6,18 @@ import type {
   _Transform,
 } from 'nuxt/dist/app/composables/asyncData'
 import type { ProcedureRecord, inferHandlerInput, inferProcedureInput, inferProcedureOutput } from '@trpc/server'
-import type { TRPCClientErrorLike } from '@trpc/client'
+import type { TRPCClient, TRPCClientErrorLike } from '@trpc/client'
 import { objectHash } from 'ohash'
-// @ts-expect-error: Resolved by Nuxt
+import type { Ref } from 'vue'
-import { useAsyncData, useState } from '#imports'
+import { useStorage } from '@vueuse/core'
-// @ts-expect-error: Resolved by Nuxt
+import { useAsyncData, useNuxtApp, useState } from '#app'
-import { useClient } from '#build/trpc-client'
-// @ts-expect-error: Resolved by Nuxt
 import type { router } from '~/server/trpc'
 
+type MaybeRef<T> = T | Ref<T>
+
 type AppRouter = typeof router
 
-type inferProcedures<
+export type inferProcedures<
   TObj extends ProcedureRecord<any, any, any, any, any, any>,
 > = {
   [TPath in keyof TObj]: {
@@ -26,10 +26,20 @@ type inferProcedures<
   };
 }
 
-type TQueries = AppRouter['_def']['queries']
+export type TQueries = AppRouter['_def']['queries']
-type TError = TRPCClientErrorLike<AppRouter>
+export type TError = TRPCClientErrorLike<AppRouter>
 
-type TQueryValues = inferProcedures<AppRouter['_def']['queries']>
+export type TQueryValues = inferProcedures<AppRouter['_def']['queries']>
+
+/**
+ * Calculates the key used for `useAsyncData` call
+ * @param pathAndInput
+ */
+export function getQueryKey<
+    TPath extends keyof TQueryValues & string,
+    >(pathAndInput: [path: TPath, ...args: inferHandlerInput<TQueries[TPath]>]) {
+  return `${pathAndInput[0]}-${objectHash(pathAndInput[1] ? JSON.stringify(pathAndInput[1]) : '')}`
+}
 
 export async function useAsyncQuery<
   TPath extends keyof TQueryValues & string,
@@ -40,16 +50,16 @@ export async function useAsyncQuery<
   pathAndInput: [path: TPath, ...args: inferHandlerInput<TQueries[TPath]>],
   options: AsyncDataOptions<TOutput, Transform, PickKeys> = {},
 ): Promise<AsyncData<PickFrom<ReturnType<Transform>, PickKeys>, TError>> {
-  const client = useClient()
+  const { $client } = useNuxtApp()
-  const key = `${pathAndInput[0]}-${objectHash(pathAndInput[1] ? JSON.stringify(pathAndInput[1]) : '')}`
+  const key = getQueryKey(pathAndInput)
   const serverError = useState<TError | null>(`error-${key}`, () => null)
   const { error, data, ...rest } = await useAsyncData(
     key,
-    () => client.query(...pathAndInput),
+    () => $client.query(...pathAndInput),
+    // @ts-expect-error: Internal
     options,
   )
 
-  // @ts-expect-error: Resolved by Nuxt
   if (process.server && error.value && !serverError.value)
     serverError.value = error.value as any
 
@@ -62,3 +72,12 @@ export async function useAsyncQuery<
     error: serverError,
   } as any
 }
+
+export function useClient(): TRPCClient<AppRouter> {
+  const { $client } = useNuxtApp()
+  return $client
+}
+
+export function useClientHeaders(initialValue: MaybeRef<Record<string, any>> = {}): Ref<Record<string, any>> {
+  return useStorage('trpc-nuxt-header', initialValue)
+}

src/runtime/plugin.ts

@@ -0,0 +1,30 @@
+import * as trpc from '@trpc/client'
+import { unref } from 'vue'
+import { useClientHeaders } from './client'
+import { defineNuxtPlugin, useRequestHeaders, useRuntimeConfig } from '#app'
+import type { router } from '~/server/trpc'
+
+declare type AppRouter = typeof router
+
+export default defineNuxtPlugin((nuxtApp) => {
+  const config = useRuntimeConfig().public.trpc
+  const headers = useRequestHeaders()
+  const otherHeaders = useClientHeaders()
+  const client = trpc.createTRPCClient<AppRouter>({
+    url: `${config.baseURL}${config.endpoint}`,
+    headers: () => {
+      return {
+        ...unref(otherHeaders),
+        ...headers,
+      }
+    },
+  })
+
+  nuxtApp.provide('client', client)
+})
+
+declare module '#app' {
+  interface NuxtApp {
+    $client: trpc.TRPCClient<AppRouter>
+  }
+}