chore: release v0.3.7

.nuxtrc

@@ -0,0 +1,2 @@
+imports.autoImport=false
+typescript.includeWorkspace=true

README.md

@@ -1,10 +1,12 @@
 # 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.
 
 <p align="center">
   <figure>
-    <img src="https://i.imgur.com/3AZlBZH.gif" alt="Demo" />
+    <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.
@@ -13,9 +15,154 @@ End-to-end typesafe APIs with [tRPC.io](https://trpc.io/) in Nuxt applications.
   </figure>
 </p>
 
-Docs: https://trpc-nuxt.vercel.app
+## Install
 
-For version 3 of this module (tRPC v9, auto-imports, auto handlers), [go here](https://github.com/wobsoriano/trpc-nuxt/tree/v3).
+```bash
+npm i trpc-nuxt@0.3
+```
+
+```ts
+// nuxt.config.ts
+import { defineNuxtConfig } from 'nuxt'
+
+export default defineNuxtConfig({
+  modules: ['trpc-nuxt'],
+  trpc: {
+    baseURL: '', // Set empty string (default) to make requests by relative address
+    endpoint: '/trpc', // defaults to /trpc
+    installPlugin: true, // defaults to true. Add @trpc/client plugin and composables
+  },
+  typescript: {
+    strict: true // required 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 newUser = 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
+  lazy: false
+})
+```
+
+## useClientHeaders
+
+A composable that lets you add additional properties to pass to the tRPC Client. It uses `useState` from [nuxt 3](https://v3.nuxtjs.org/api/composables/use-state).
+
+```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.
+```
+
+If your app needs transformers and other option that needs to be passed in `@trpc/client`, you will need to opt-out of the plugin by setting `installPlugin` to false in your `nuxt.config.ts` file and create your own. You can just copy the contents of the client plugin [here](https://github.com/wobsoriano/trpc-nuxt/blob/master/src/runtime/client.ts).
+
+## 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 { H3Event } 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: H3Event) => {
+  // ...
+  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)
+- [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/v9).
 
 ## Recommended IDE Setup
 

api.d.ts

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

docs/.gitignore

@@ -1 +0,0 @@
-.vercel

docs/README.md

@@ -1 +0,0 @@
-docs

docs/app.config.ts

@@ -1,25 +0,0 @@
-export default defineAppConfig({
-  docus: {
-    title: 'tRPC Nuxt',
-    image: 'https://og-image.vercel.app/tRPC-Nuxt',
-    alt: 'tRPC-Nuxt cover',
-    url: 'https://trpc-nuxt.vercel.app',
-    debug: false,
-    socials: {
-      github: 'wobsoriano/trpc-nuxt'
-    },
-    aside: {
-      level: 1
-    },
-    footer: {
-      credits: true,
-      icons: [
-        {
-          label: 'NuxtJS',
-          href: 'https://nuxtjs.org',
-          component: 'IconNuxt'
-        }
-      ]
-    }
-  }
-})

docs/content/1.get-started/1.installation.md

@@ -1,38 +0,0 @@
----
-title: Installation
-description: tRPC-Nuxt provides first class integration with tRPC.
----
-
-# Installation
-
-::code-group
-
-```bash [pnpm]
-pnpm add @trpc/server@next @trpc/client@next trpc-nuxt zod
-```
-
-```bash [npm]
-npm install @trpc/server@next @trpc/client@next trpc-nuxt zod
-```
-
-```bash [yarn]
-yarn add @trpc/server@next @trpc/client@next trpc-nuxt zod
-```
-
-::
-
-#### Why @trpc/server?
-
-For implementing tRPC endpoints and routers.
-
-#### Why @trpc/client?
-
-For making typesafe API calls from your client.
-
-#### Why zod?
-
-Most examples use [Zod](https://github.com/colinhacks/zod) for input validation and tRPC.io highly recommends it, though it isn't required.
-
-## Next Steps
-
-Now that you've installed the required dependencies, you are ready to start building your application.

docs/content/1.get-started/2.usage.md

@@ -1,130 +0,0 @@
----
-title: Usage
-description: tRPC-Nuxt provides first class integration with tRPC.
----
-
-# Usage
-
-## Recommended file structure
-
-Recommended but not enforced file structure. This is what you get when starting from [the examples](../main/example-apps.md).
-
-```graphql
-.
-├── server
-│   ├── api
-│   │   └── trpc
-│   │       └── [trpc].ts  # <-- tRPC HTTP handler
-│   │   └── [..]
-│   ├── trpc
-│   │   ├── routers
-│   │   │   ├── index.ts  # <-- main app router
-│   │   │   ├── todo.ts  # <-- sub routers
-│   │   │   └── [..]
-│   │   ├── context.ts   # <-- create app context
-│   │   └── trpc.ts      # <-- procedure helpers
-├── plugins
-│   ├── client.ts  # <-- tRPC Client as a plugin
-└── [..]
-```
-
-## 1. Create a tRPC router
-
-Initialize your tRPC backend using the `initTRPC` function and create your first router.
-
-::code-group
-
-```ts [server/trpc/trpc.ts]
-import { initTRPC } from '@trpc/server'
-
-// Avoid exporting the entire t-object since it's not very
-// descriptive and can be confusing to newcomers used to t
-// meaning translation in i18n libraries.
-const t = initTRPC.create()
-
-// Base router and procedure helpers
-export const router = t.router
-export const publicProcedure = t.procedure
-```
-
-```ts [server/trpc/routers/index.ts]
-import { z } from 'zod'
-import { publicProcedure, router } from '../trpc'
-
-export const appRouter = router({
-  hello: publicProcedure
-    .input(
-      z.object({
-        text: z.string().nullish(),
-      }),
-    )
-    .query(({ input }) => {
-      return {
-        greeting: `hello ${input?.text ?? 'world'}`,
-      }
-    }),
-})
-
-// export type definition of API
-export type AppRouter = typeof appRouter
-```
-
-```ts [server/api/trpc/[trpc].ts]
-import { createNuxtApiHandler } from 'trpc-nuxt'
-import { appRouter } from '@/server/trpc/routers'
-
-// export API handler
-export default createNuxtApiHandler({
-  router: appRouter,
-  createContext: () => ({}),
-})
-```
-
-::
-
-::alert{type=info}
-If you need to split your router into several subrouters, you can implement them in the `server/trpc/routers` directory and import and [merge them](https://trpc.io/docs/v10/merging-routers) to a single root `appRouter`.
-::
-
-## 2. Create tRPC client plugin
-
-Create a strongly-typed plugin using your API's type signature.
-
-```ts [plugins/client.ts]
-import { httpBatchLink, createTRPCProxyClient } from '@trpc/client'
-import type { AppRouter } from '@/server/trpc/routers'
-
-export default defineNuxtPlugin(() => {
-  const client = createTRPCProxyClient<AppRouter>({
-    links: [
-      httpBatchLink({
-        /**
-         * If you want to use SSR, you need to use the server's full URL
-         * @link https://trpc.io/docs/ssr
-         **/
-        url: 'http://localhost:3000/api/trpc',
-      }),
-    ],
-  })
-
-  return {
-    provide: {
-      client,
-    },
-  }
-})
-```
-
-## 3. Make API requests
-
-```vue [pages/index.vue]
-<script setup lang="ts">
-const { $client } = useNuxtApp()
-
-const data = await $client.hello.query({ text: 'client' })
-</script>
-
-<template>
-  <p>{{data?.greeting }}</p>
-</template>
-```

docs/content/1.get-started/3.tips/1.composables.md

@@ -1,40 +0,0 @@
----
-title: Composables
----
-
-# Composables
-
-It is often useful to wrap functionality of your `@trpc/client` api within other functions. For this purpose, it's necessary to be able to infer input types and output types generated by your `@trpc/server` router.
-
-## Inference Helpers
-
-`@trpc/server` exports the following helper types to assist with inferring these types from the `AppRouter` exported by your `@trpc/server` router:
-
-- `inferRouterInputs<TRouter>`
-- `inferRouterOutputs<TRouter>`
-
-Let's assume we have this example query wrapped within Nuxt's [useAsyncData](https://v3.nuxtjs.org/api/composables/use-async-data/):
-
-```ts
-const { data, error } = await useAsyncData(() => $client.todo.getTodos.query())
-```
-
-We can wrap this in a composable and also set the client error types:
-
-```ts [composables/useGetTodos.ts]
-import { TRPCClientError } from '@trpc/client'
-import type { inferRouterOutputs } from '@trpc/server'
-import type { AppRouter } from '@/server/trpc/routers'
-
-type RouterOutput = inferRouterOutputs<AppRouter>
-type GetTodosOutput = RouterOutput['todo']['getTodos']
-
-type ErrorOutput = TRPCClientError<AppRouter>
-
-export default function useGetTodos() {
-  const { $client } = useNuxtApp()
-  return useAsyncData<GetTodosOutput, ErrorOutput>(() => $client.todo.getTodos.query())
-}
-```
-
-Now, we have a fully-typed composable.

docs/content/1.get-started/3.tips/2.server-side-calls.md

@@ -1,84 +0,0 @@
----
-title: Server Side Calls
----
-
-# Server Side Calls
-
-You may need to call your procedure(s) directly from the server, `createCaller()` function returns you an instance of `RouterCaller` able to execute queries and mutations.
-
-## Input query example
-
-We create the router with a input query and then we call the asynchronous `greeting` procedure to get the result.
-
-::code-group
-
-```ts [server/trpc/trpc.ts]
-import { initTRPC } from '@trpc/server'
-import { z } from 'zod'
- 
-const t = initTRPC.create()
- 
-export const router = t.router({
-  // Create procedure at path 'greeting'
-  greeting: t.procedure
-    .input(z.object({ name: z.string() }))
-    .query(({ input }) => `Hello ${input.name}`),
-})
-```
-
-```ts [server/api/greeting.ts]
-import { router } from '@/server/trpc/trpc'
-
-export default eventHandler(async (event) => {
-  const { name } = getQuery(event)
-  const caller = router.createCaller({})
-
-  const greeting = await caller.greeting({ name })
-
-  return {
-    greeting
-  }
-})
-```
-
-::
-
-## Mutation example
-
-We create the router with a mutation and then we call the asynchronous `post` procedure to get the result.
-
-::code-group
-
-```ts [server/trpc/trpc.ts]
-import { initTRPC } from '@trpc/server'
-import { z } from 'zod'
- 
-const posts = ['One', 'Two', 'Three']
- 
-const t = initTRPC.create()
-export const router = t.router({
-  post: t.router({
-    add: t.procedure.input(z.string()).mutation(({ input }) => {
-      posts.push(input)
-      return posts
-    }),
-  }),
-})
-```
-
-```ts [server/api/post.ts]
-import { router } from '@/server/trpc/trpc'
-
-export default eventHandler(async (event) => {
-  const body = await getBody(event)
-  const caller = router.createCaller({})
-
-  const post = await caller.post.add(body.post)
-
-  return {
-    post
-  }
-})
-```
-
-::

docs/content/1.get-started/3.tips/3.aborting-procedures.md

@@ -1,24 +0,0 @@
----
-title: Aborting Procedures
----
-
-# Aborting Procedures
-
-tRPC adheres to the industry standard when it comes to aborting procedures. All you have to do is pass an `AbortSignal` to the query-options and then call its parent `AbortController`'s `abort` method.
-
-```ts [composables/useGetTodo.ts]
-export default function useGetTodo(id: number) {
-  const { $client } = useNuxtApp()
-  const ac = new AbortController()
-
-  onScopeDispose(() => {
-    ac.abort()
-  })
-  
-  return useAsyncData(() => {
-    return $client.todo.getTodo.query(id, {
-      signal: ac.signal
-    })
-  })
-}
-```

docs/content/1.get-started/3.tips/4.authorization.md

@@ -1,104 +0,0 @@
----
-title: Authorization
----
-
-# 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/context.ts]
-import type { H3Event } from 'h3'
-import { inferAsyncReturnType } from '@trpc/server'
-import { decodeAndVerifyJwtToken } from './somewhere/in/your/app/utils'
-
-export async function createContext({
-  req,
-  res,
-}: H3Event) {
-  // 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 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>
-```
-
-## Option 1: Authorize using resolver
-
-```ts
-import { TRPCError, initTRPC } from '@trpc/server'
-import type { Context } from '../context'
-
-export const t = initTRPC.context<Context>().create()
-
-const appRouter = t.router({
-  // open for anyone
-  hello: t.procedure
-    .input(z.string().nullish())
-    .query(({ input, ctx }) => `hello ${input ?? ctx.user?.name ?? 'world'}`),
-  // checked in resolver
-  secret: t.procedure.query(({ ctx }) => {
-    if (!ctx.user) {
-      throw new TRPCError({ code: 'UNAUTHORIZED' })
-    }
-    return {
-      secret: 'sauce',
-    }
-  }),
-})
-```
-
-## Option 2: Authorize using middleware
-
-```ts
-import { TRPCError, initTRPC } from '@trpc/server'
-
-export const t = initTRPC.context<Context>().create()
-
-const isAuthed = t.middleware(({ next, ctx }) => {
-  if (!ctx.user?.isAdmin) {
-    throw new TRPCError({ code: 'UNAUTHORIZED' })
-  }
-  return next({
-    ctx: {
-      user: ctx.user,
-    },
-  })
-})
-
-// you can reuse this for any procedure
-export const protectedProcedure = t.procedure.use(isAuthed)
-
-t.router({
-  // this is accessible for everyone
-  hello: t.procedure
-    .input(z.string().nullish())
-    .query(({ input, ctx }) => `hello ${input ?? ctx.user?.name ?? 'world'}`),
-  admin: t.router({
-    // this is accessible only to admins
-    secret: protectedProcedure.query(({ ctx }) => {
-      return {
-        secret: 'sauce',
-      }
-    }),
-  }),
-})
-```
-
-This page is entirely based on [authorization docs](https://trpc.io/docs/v10/authorization) of tRPC with a minimal change made to work with Nuxt.

docs/content/1.get-started/index.md

@@ -1,4 +0,0 @@
----
-navigation: false
-redirect: /get-started/installation
----

docs/content/2.examples/1.basic.md

@@ -1,6 +0,0 @@
----
-title: Basic
-description: tRPC-Nuxt provides first class integration with tRPC.
----
-
-# Basic Example

docs/content/2.examples/2.multiple-routers.md

@@ -1,6 +0,0 @@
----
-title: Multiple Routers
-description: tRPC-Nuxt provides first class integration with tRPC.
----
-
-# Multi Routers

docs/content/index.md

@@ -1,31 +0,0 @@
----
-title: "tRPC Nuxt"
-description: "End-to-end typesafe APIs in Nuxt applications."
-navigation: false
-layout: page
----
-
-::block-hero
----
-cta:
-  - Get Started
-  - /get-started/installation
-secondary:
-  - Star on GitHub ->
-  - https://github.com/wobsoriano/trpc-nuxt
-snippet: npm install trpc-nuxt
----
-
-#title
-tRPC [Nuxt]{.text-primary-500}
-
-#description
-End-to-end typesafe APIs in Nuxt applications. 
-
-#extra
-  ::list
-  - Automatic typesafety 
-  - Snappy DX
-  - Autocompletion on the client, for inputs, outputs and errors
-  ::
-::

docs/nuxt.config.ts

@@ -1,22 +0,0 @@
-export default defineNuxtConfig({
-  app: {
-    pageTransition: false,
-    layoutTransition: false
-  },
-  modules: ['@nuxtlabs/github-module'],
-  extends: process.env.DOCUS_THEME_PATH || '@nuxt-themes/docus',
-  github: {
-    owner: 'wobsoriano',
-    repo: 'trpc-nuxt',
-    branch: 'next'
-  },
-  colorMode: {
-    preference: 'dark'
-  },
-  build: {
-    transpile: [/content-edge/, /github-module/]
-  },
-  nitro: {
-    preset: 'vercel'
-  }
-})

docs/package.json

@@ -1,17 +0,0 @@
-{
-  "name": "docs",
-  "description": "Docs for TRPC-Nuxt",
-  "scripts": {
-    "dev": "nuxi dev",
-    "build": "nuxi build",
-    "generate": "nuxi build",
-    "preview": "nuxi preview"
-  },
-  "dependencies": {
-    "nuxt": "^3.0.0"
-  },
-  "devDependencies": {
-    "@nuxt-themes/docus": "^0.3.1",
-    "@nuxtlabs/github-module": "^1.5.3"
-  }
-}

docs/tokens.config.ts

@@ -1,18 +0,0 @@
-import { defineTheme } from 'pinceau'
-
-export default defineTheme({
-  colors: {
-    primary: {
-      50: '#BFEDFC',
-      100: '#B0E9FB',
-      200: '#93DEFA',
-      300: '#76D4F9',
-      400: '#58C8F7',
-      500: '#3BBBF6',
-      600: '#0BA6F3',
-      700: '#0981C2',
-      800: '#075E91',
-      900: '#043D61'
-    }
-  }
-})

docs/tsconfig.json

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

package.json

@@ -1,68 +1,66 @@
 {
   "name": "trpc-nuxt",
-  "description": "End-to-end typesafe APIs in Nuxt applications.",
   "type": "module",
-  "version": "0.4.2",
+  "version": "0.3.7",
   "license": "MIT",
-  "sideEffects": false,
   "exports": {
+    "./package.json": "./package.json",
     ".": {
-      "require": "./dist/index.cjs",
+      "require": "./dist/module.cjs",
-      "import": "./dist/index.mjs"
+      "import": "./dist/module.mjs"
+    },
+    "./api": {
+      "types": "./dist/runtime/api.d.ts",
+      "import": "./dist/runtime/api.mjs"
     }
   },
-  "main": "./dist/index.mjs",
+  "main": "./dist/module.cjs",
-  "module": "./dist/index.mjs",
+  "types": "./dist/types.d.ts",
-  "types": "./dist/index.d.ts",
   "files": [
-    "dist"
+    "dist",
+    "*.d.ts"
   ],
   "scripts": {
-    "dev": "concurrently \"pnpm build --watch\" \"pnpm --filter playground dev\"",
+    "build": "nuxt-module-build",
-    "dev:prepare": "pnpm build && nuxt prepare playground",
+    "dev": "nuxi dev playground",
-    "prepublishOnly": "pnpm build",
+    "dev:build": "nuxi build playground",
-    "build": "tsup",
+    "dev:preview": "nuxi preview playground",
+    "dev:prepare": "nuxt-module-build --stub && nuxi prepare playground",
     "lint": "eslint .",
     "lint:fix": "eslint . --fix",
-    "release": "bumpp && npm publish"
+    "release": "bumpp --commit --push --tag && npm publish",
+    "prepare": "nuxi prepare playground",
+    "prepublishOnly": "pnpm build"
   },
   "peerDependencies": {
-    "@trpc/client": "^10.0.0-proxy-beta.21",
+    "@trpc/client": "<10.0.0",
-    "@trpc/server": "^10.0.0-proxy-beta.21"
+    "@trpc/server": "<10.0.0"
   },
   "dependencies": {
-    "h3": "^1.0.1",
+    "@nuxt/kit": "3.0.0",
-    "nanoid": "^4.0.0",
+    "@trpc/client": "^9.27.4",
+    "@trpc/server": "^9.27.4",
+    "dedent": "^0.7.0",
+    "defu": "^6.1.1",
+    "h3": "^1.0.2",
+    "ofetch": "^1.0.0",
     "ohash": "^1.0.0",
-    "ufo": "^1.0.0"
+    "pathe": "^1.0.0",
+    "ufo": "^1.0.1"
   },
   "devDependencies": {
-    "@nuxtjs/eslint-config-typescript": "^11.0.0",
+    "@antfu/eslint-config": "^0.34.0",
-    "@trpc/client": "10.0.0-rc.8",
+    "@nuxt/module-builder": "^0.2.1",
-    "@trpc/server": "10.0.0-rc.8",
+    "@types/dedent": "^0.7.0",
     "bumpp": "^8.2.1",
-    "concurrently": "^7.5.0",
     "eslint": "^8.25.0",
-    "tsup": "6.4.0",
+    "nuxt": "3.0.0",
-    "typescript": "^4.7.4"
+    "zod": "^3.20.2"
   },
   "eslintConfig": {
-    "extends": [
+    "extends": "@antfu",
-      "@nuxtjs/eslint-config-typescript"
-    ],
     "rules": {
-      "@typescript-eslint/no-unused-vars": [
+      "no-console": "warn"
-        "off"
-      ],
-      "vue/multi-word-component-names": "off",
-      "vue/no-multiple-template-root": "off"
     }
-  },
+  }
-  "eslintIgnore": [
-    "*.json",
-    "node_modules",
-    "*.md",
-    "dist",
-    ".output"
-  ]
 }

playground/nuxt.config.ts

@@ -1,3 +1,9 @@
+import Module from '../src/module'
+
 // https://v3.nuxtjs.org/api/configuration/nuxt.config
 export default defineNuxtConfig({
+  modules: [Module],
+  runtimeConfig: {
+    baseURL: '',
+  },
 })

playground/package.json

@@ -1,21 +1,4 @@
 {
   "name": "playground",
-  "private": true,
+  "private": true
-  "scripts": {
-    "build": "nuxt build",
-    "dev": "nuxt dev",
-    "generate": "nuxt generate",
-    "preview": "nuxt preview",
-    "postinstall": "nuxt prepare"
-  },
-  "dependencies": {
-    "@trpc/client": "10.0.0-rc.8",
-    "@trpc/server": "10.0.0-rc.8",
-    "superjson": "^1.11.0",
-    "trpc-nuxt": "workspace:*",
-    "zod": "^3.19.1"
-  },
-  "devDependencies": {
-    "nuxt": "^3.0.0"
-  }
 }

playground/pages/index.vue

@@ -1,61 +1,56 @@
 <script setup lang="ts">
-import { TRPCClientError } from '@trpc/client';
+import { useAsyncQuery, useClient, useClientHeaders } from '#imports'
-import type { inferRouterOutputs } from '@trpc/server';
+const client = useClient()
-import type { AppRouter } from '~~/server/trpc/routers';
+const headers = useClientHeaders()
+const { data: todos, pending, error, refresh } = await useAsyncQuery(['getTodos'])
 
-const { $client } = useNuxtApp()
+const addHeader = () => {
-// const headers = useClientHeaders()
+  headers.value.authorization = 'Bearer abcdefghijklmnop'
-
+  console.log(headers.value)
-// const addHeader = () => {
+}
-//   headers.value.authorization = 'Bearer abcdefghijklmnop'
-//   console.log(headers.value)
-// }
 
 const addTodo = async () => {
   const title = Math.random().toString(36).slice(2, 7)
 
   try {
-    const x = await $client.todo.addTodo.mutate({
+    const result = await client.mutation('addTodo', {
       id: Date.now(),
       userId: 69,
       title,
-      completed: false
+      completed: false,
     })
-    console.log(x)
+    console.log('Todo: ', result)
-  } catch (e) {
+  }
+  catch (e) {
     console.log(e)
   }
 }
-
-type RouterOutput = inferRouterOutputs<AppRouter>;
-type ErrorOutput = TRPCClientError<AppRouter>
-
-const { data: todos, pending, error, refresh } = await useAsyncData<RouterOutput['todo']['getTodos'], ErrorOutput>(() => $client.todo.getTodos.query())
 </script>
 
 <template>
-  <div>
+  <div v-if="pending">
-    <div v-if="pending">
+    Loading...
-      Loading...
+  </div>
-    </div>
+  <div v-else-if="error?.data?.code">
-    <div v-else-if="error?.data?.code">
+    Error: {{ error.data.code }}
-      Error: {{ error.data.code }}
+  </div>
-    </div>
+  <div v-else-if="todos">
-    <div v-else>
+    <ul>
-      <ul>
+      <li v-for="t in todos.slice(0, 10)" :key="t.id">
-        <li v-for="t in todos?.slice(0, 10)" :key="t.id">
+        <NuxtLink :class="{ completed: t.completed }" :to="`/todo/${t.id}`">
-          <NuxtLink :class="{ completed: t.completed }" :to="`/todo/${t.id}`">
+          Title: {{ t.title }}
-            Title: {{ t.title }}
+        </NuxtLink>
-          </NuxtLink>
+      </li>
-        </li>
+    </ul>
-      </ul>
+    <button @click="addTodo">
-      <button @click="addTodo">
+      Add Todo
-        Add Todo
+    </button>
-      </button>
+    <button @click="() => refresh()">
-      <button @click="() => refresh()">
+      Refresh
-        Refresh
+    </button>
-      </button>
+    <button @click="addHeader">
-    </div>
+      Add header
+    </button>
   </div>
 </template>
 

playground/pages/todo/[id].vue

@@ -1,7 +1,7 @@
 <script setup lang="ts">
+import { useAsyncQuery, useRoute } from '#imports'
 const route = useRoute()
-const { $client } = useNuxtApp()
+const { data: todo, pending, error } = await useAsyncQuery(['getTodo', Number(route.params.id)])
-const { data: todo, pending, error } = await useAsyncData(() => $client.todo.getTodo.query(Number(route.params.id)))
 </script>
 
 <template>

playground/plugins/trpc-client.ts

@@ -1,26 +0,0 @@
-import { createTRPCProxyClient, httpBatchLink, loggerLink } from '@trpc/client'
-import superjson from 'superjson'
-import type { AppRouter } from '~~/server/trpc/routers'
-
-export default defineNuxtPlugin(() => {
-  const client = createTRPCProxyClient<AppRouter>({
-    transformer: superjson,
-    links: [
-      // adds pretty logs to your console in development and logs errors in production
-      loggerLink({
-        enabled: opts =>
-          process.env.NODE_ENV === 'development' ||
-          (opts.direction === 'down' && opts.result instanceof Error)
-      }),
-      httpBatchLink({
-        url: 'http://localhost:3000/api/trpc'
-      })
-    ]
-  })
-
-  return {
-    provide: {
-      client
-    }
-  }
-})

playground/server/api/trpc/[trpc].ts

@@ -1,23 +0,0 @@
-import { createNuxtApiHandler } from 'trpc-nuxt'
-import { appRouter } from '@/server/trpc/routers'
-import { createContext } from '@/server/trpc/context'
-
-export default createNuxtApiHandler({
-  router: appRouter,
-  /**
-   * @link https://trpc.io/docs/context
-   */
-  createContext,
-  onError ({ error }) {
-    if (error.code === 'INTERNAL_SERVER_ERROR') {
-      // send to bug reporting
-      console.error('Something went wrong', error)
-    }
-  }
-  /**
-   * @link https://trpc.io/docs/caching#api-response-caching
-   */
-  // responseMeta() {
-  //   // ...
-  // },
-})

playground/server/trpc/context.ts

@@ -1,17 +0,0 @@
-/* eslint-disable @typescript-eslint/no-unused-vars */
-import type { inferAsyncReturnType } from '@trpc/server'
-import type { H3Event } from 'h3'
-
-export type Context = inferAsyncReturnType<typeof createContext>
-
-/**
- * Creates context for an incoming request
- * @link https://trpc.io/docs/context
- */
-export function createContext (
-  opts: H3Event
-) {
-  // for API-response caching see https://trpc.io/docs/caching
-
-  return {}
-}

playground/server/trpc/index.ts

@@ -0,0 +1,52 @@
+import * as trpc from '@trpc/server'
+import type { inferAsyncReturnType } from '@trpc/server'
+import { z } from 'zod'
+import type { H3Event } from 'h3'
+
+const baseURL = 'https://jsonplaceholder.typicode.com'
+
+const TodoShape = z.object({
+  userId: z.number(),
+  id: z.number(),
+  title: z.string(),
+  completed: z.boolean(),
+})
+
+export type Todo = z.infer<typeof TodoShape>
+
+export const router = trpc.router<Context>()
+  .query('getTodos', {
+    async resolve() {
+      return await $fetch<Todo[]>(`${baseURL}/todos`)
+    },
+  })
+  .query('getTodo', {
+    input: z.number(),
+    async resolve(req) {
+      return await $fetch<Todo>(`${baseURL}/todos/${req.input}`)
+    },
+  })
+  .mutation('addTodo', {
+    input: TodoShape,
+    async resolve(req) {
+      return await $fetch<Todo>(`${baseURL}/todos`, {
+        method: 'POST',
+        body: req.input,
+      })
+    },
+  })
+
+export async function createContext(event: H3Event) {
+  // 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
+  // const x = useCookies(event)
+  console.log(event.node.req.headers)
+
+  return {
+
+  }
+}
+
+  type Context = inferAsyncReturnType<typeof createContext>

playground/server/trpc/routers/index.ts

@@ -1,10 +0,0 @@
-import { router } from '../trpc'
-import { todoRouter } from './todo'
-import { userRouter } from './user'
-
-export const appRouter = router({
-  todo: todoRouter,
-  user: userRouter
-})
-
-export type AppRouter = typeof appRouter

playground/server/trpc/routers/todo.ts

@@ -1,33 +0,0 @@
-import { z } from 'zod'
-import { publicProcedure, router } from '../trpc'
-
-const baseURL = 'https://jsonplaceholder.typicode.com'
-
-const TodoShape = z.object({
-  userId: z.number(),
-  id: z.number(),
-  title: z.string(),
-  completed: z.boolean()
-})
-
-export type Todo = z.infer<typeof TodoShape>
-
-export const todoRouter = router({
-  getTodos: publicProcedure
-    .query(() => {
-      return $fetch<Todo[]>(`${baseURL}/todos`)
-    }),
-  getTodo: publicProcedure
-    .input(z.number())
-    .query((req) => {
-      return $fetch<Todo>(`${baseURL}/todos/${req.input}`)
-    }),
-  addTodo: publicProcedure
-    .input(TodoShape)
-    .mutation((req) => {
-      return $fetch<Todo>(`${baseURL}/todos`, {
-        method: 'POST',
-        body: req.input
-      })
-    })
-})

playground/server/trpc/routers/user.ts

@@ -1,33 +0,0 @@
-import { z } from 'zod'
-import { publicProcedure, router } from '../trpc'
-
-const baseURL = 'https://jsonplaceholder.typicode.com'
-
-const UserShape = z.object({
-  id: z.number(),
-  name: z.string(),
-  username: z.string(),
-  email: z.string()
-})
-
-export type User = z.infer<typeof UserShape>
-
-export const userRouter = router({
-  getUsers: publicProcedure
-    .query(() => {
-      return $fetch<User[]>(`${baseURL}/users`)
-    }),
-  getUser: publicProcedure
-    .input(z.number())
-    .query((req) => {
-      return $fetch<User>(`${baseURL}/users/${req.input}`)
-    }),
-  addUser: publicProcedure
-    .input(UserShape)
-    .mutation((req) => {
-      return $fetch<User>(`${baseURL}/users`, {
-        method: 'POST',
-        body: req.input
-      })
-    })
-})

playground/server/trpc/trpc.ts

@@ -1,43 +0,0 @@
-import { initTRPC } from '@trpc/server'
-import superjson from 'superjson'
-import { ZodError } from 'zod'
-import type { Context } from './context'
-
-const t = initTRPC.context<Context>().create({
-  transformer: superjson,
-  errorFormatter ({ shape, error }) {
-    return {
-      ...shape,
-      data: {
-        ...shape.data,
-        zodError:
-          error.code === 'BAD_REQUEST' &&
-          error.cause instanceof ZodError
-            ? error.cause!.flatten()
-            : null
-      }
-    }
-  }
-})
-
-/**
- * Create a router
- * @see https://trpc.io/docs/v10/router
- */
-export const router = t.router
-
-/**
-  * Create an unprotected procedure
-  * @see https://trpc.io/docs/v10/procedures
-  **/
-export const publicProcedure = t.procedure
-
-/**
-  * @see https://trpc.io/docs/v10/middlewares
-  */
-export const middleware = t.middleware
-
-/**
-  * @see https://trpc.io/docs/v10/merging-routers
-  */
-export const mergeRouters = t.mergeRouters

playground/tsconfig.json

@@ -1,4 +0,0 @@
-{
-  // https://v3.nuxtjs.org/concepts/typescript
-  "extends": "./.nuxt/tsconfig.json"
-}

pnpm-workspace.yaml

@@ -1,3 +1,2 @@
 packages:
   - playground
-  - docs

recipes/authorization.md

@@ -0,0 +1,102 @@
+## 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 { H3Event } 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 }: H3Event) {
+  // 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).

recipes/error-formatting.md

@@ -0,0 +1,41 @@
+## 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).

recipes/error-handling.md

@@ -0,0 +1,15 @@
+## 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
+  }
+}
+```

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>
+```

recipes/validation.md

@@ -0,0 +1,49 @@
+## 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).

src/module.ts

@@ -0,0 +1,79 @@
+import { fileURLToPath } from 'url'
+import { join, resolve } from 'pathe'
+import { defu } from 'defu'
+import dedent from 'dedent'
+
+import { addImports, addPlugin, addServerHandler, addTemplate, defineNuxtModule, useLogger } from '@nuxt/kit'
+
+export interface ModuleOptions {
+  baseURL: string
+  endpoint: string
+  installPlugin?: boolean
+}
+
+const metaName = 'trpc-nuxt'
+
+export default defineNuxtModule<ModuleOptions>({
+  meta: {
+    name: metaName,
+    configKey: 'trpc',
+  },
+  defaults: {
+    baseURL: '',
+    endpoint: '/trpc',
+    installPlugin: true,
+  },
+  async setup(options, nuxt) {
+    const logger = useLogger(metaName)
+
+    const handlerPath = join(nuxt.options.buildDir, 'trpc-handler.ts')
+    const trpcOptionsPath = join(nuxt.options.srcDir, 'server/trpc')
+
+    const runtimeDir = fileURLToPath(new URL('./runtime', import.meta.url))
+    nuxt.options.build.transpile.push(runtimeDir, handlerPath)
+
+    // Final resolved configuration
+    const finalConfig = nuxt.options.runtimeConfig.public.trpc = defu(nuxt.options.runtimeConfig.public.trpc, {
+      baseURL: options.baseURL,
+      endpoint: options.endpoint,
+      installPlugin: options.installPlugin,
+    })
+
+    addServerHandler({
+      route: `${finalConfig.endpoint}/*`,
+      handler: handlerPath,
+    })
+
+    addTemplate({
+      filename: 'trpc-handler.ts',
+      write: true,
+      getContents() {
+        return dedent`
+          import { createTRPCHandler } from ${JSON.stringify(join(runtimeDir, 'api'))};
+          import * as functions from ${JSON.stringify(trpcOptionsPath)};
+    
+          export default createTRPCHandler({
+            ...functions,
+            endpoint: '${finalConfig.endpoint}'
+          })
+        `
+      },
+    })
+
+    if (finalConfig.installPlugin) {
+      addImports([
+        { name: 'useClient', from: join(runtimeDir, 'client') },
+        { name: 'useAsyncQuery', from: join(runtimeDir, 'client') },
+        { name: 'useClientHeaders', from: join(runtimeDir, 'client') },
+        { name: 'getQueryKey', from: join(runtimeDir, 'client') },
+      ])
+
+      addPlugin(resolve(runtimeDir, 'plugin'))
+
+      logger.success('Plugin successfully installed.')
+    }
+    else {
+      logger.info('Plugin not installed. Create your own @trpc/client client plugin and composables.')
+    }
+  },
+})

src/runtime/api.ts

@@ -1,18 +1,16 @@
-import type { ResponseMeta } from '@trpc/server/http'
+import { resolveHTTPResponse } from '@trpc/server'
-import { resolveHTTPResponse } from '@trpc/server/http'
 import type {
   AnyRouter,
   ProcedureType,
+  ResponseMeta,
+  TRPCError,
   inferRouterContext,
-  inferRouterError
+  inferRouterError,
-} from '@trpc/server'
-import {
-  TRPCError
 } from '@trpc/server'
 import { createURL } from 'ufo'
 import type { H3Event } from 'h3'
-import { createError, defineEventHandler, isMethod, readBody } from 'h3'
+import { defineEventHandler, isMethod, readBody } from 'h3'
-import type { TRPCResponse } from '@trpc/server/rpc'
+import type { TRPCResponse } from '@trpc/server/dist/declarations/src/rpc'
 
 type MaybePromise<T> = T | Promise<T>
 
@@ -39,78 +37,44 @@ export interface OnErrorPayload<TRouter extends AnyRouter> {
 
 export type OnErrorFn<TRouter extends AnyRouter> = (opts: OnErrorPayload<TRouter>) => void
 
-export interface ResolveHTTPRequestOptions<TRouter extends AnyRouter> {
+export function createTRPCHandler<Router extends AnyRouter>({
-  router: TRouter
-  createContext?: CreateContextFn<TRouter>
-  responseMeta?: ResponseMetaFn<TRouter>
-  onError?: OnErrorFn<TRouter>
-  batching?: {
-    enabled: boolean
-  }
-}
-
-function getPath (event: H3Event): string | null {
-  if (typeof event.context.params.trpc === 'string') { return event.context.params.trpc }
-
-  if (Array.isArray(event.context.params.trpc)) { return event.context.params.trpc.join('/') }
-
-  return null
-}
-
-export function createNuxtApiHandler<TRouter extends AnyRouter> ({
   router,
   createContext,
   responseMeta,
   onError,
-  batching
+  endpoint,
-}: ResolveHTTPRequestOptions<TRouter>) {
+}: {
+  router: Router
+  createContext?: CreateContextFn<Router>
+  responseMeta?: ResponseMetaFn<Router>
+  onError?: OnErrorFn<Router>
+  endpoint: string
+}) {
   return defineEventHandler(async (event) => {
     const {
       req,
-      res
+      res,
     } = event.node
 
     const $url = createURL(req.url!)
 
-    const path = getPath(event)
-
-    if (path === null) {
-      const error = router.getErrorShape({
-        error: new TRPCError({
-          message:
-            'Param "trpc" not found - is the file named `[trpc]`.ts or `[...trpc].ts`?',
-          code: 'INTERNAL_SERVER_ERROR'
-        }),
-        type: 'unknown',
-        ctx: undefined,
-        path: undefined,
-        input: undefined
-      })
-
-      throw createError({
-        statusCode: 500,
-        statusMessage: JSON.stringify(error)
-      })
-    }
-
     const httpResponse = await resolveHTTPResponse({
-      batching,
       router,
       req: {
         method: req.method!,
         headers: req.headers,
         body: isMethod(event, 'GET') ? null : await readBody(event),
-        query: $url.searchParams
+        query: $url.searchParams,
       },
-      path,
+      path: $url.pathname.substring(endpoint.length + 1),
-      createContext: async () => await createContext?.(event),
+      createContext: async () => createContext?.(event),
       responseMeta,
       onError: (o) => {
         onError?.({
           ...o,
-          req
+          req,
         })
-      }
+      },
     })
 
     const { status, headers, body } = httpResponse

src/runtime/client.ts

@@ -0,0 +1,71 @@
+import type {
+  AsyncData,
+  AsyncDataOptions,
+  KeyOfRes,
+  PickFrom,
+  _Transform,
+} from 'nuxt/dist/app/composables/asyncData'
+import type { ProcedureRecord, inferHandlerInput, inferProcedureInput, inferProcedureOutput } from '@trpc/server'
+import type { TRPCClient, TRPCClientErrorLike } from '@trpc/client'
+import { objectHash } from 'ohash'
+import type { Ref } from 'vue'
+import { useAsyncData, useNuxtApp, useState } from '#imports'
+import type { router } from '~/server/trpc'
+
+type MaybeRef<T> = T | Ref<T>
+
+type AppRouter = typeof router
+
+export type inferProcedures<
+  TObj extends ProcedureRecord<any, any, any, any, any, any>,
+> = {
+  [TPath in keyof TObj]: {
+    input: inferProcedureInput<TObj[TPath]>
+    output: inferProcedureOutput<TObj[TPath]>
+  };
+}
+
+export type TQueries = AppRouter['_def']['queries']
+export type TError = TRPCClientErrorLike<AppRouter>
+
+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,
+  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 } = useNuxtApp()
+  const key = getQueryKey(pathAndInput)
+  const result = await useAsyncData(
+    key,
+    () => $client.query(...pathAndInput),
+    // @ts-expect-error: Internal
+    options,
+  )
+
+  return result 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 useState('trpc-nuxt-header', () => initialValue)
+}

src/runtime/plugin.ts

@@ -0,0 +1,45 @@
+import * as trpc from '@trpc/client'
+import { unref } from 'vue'
+import { FetchError } from 'ofetch'
+import { useClientHeaders } from './client'
+import { defineNuxtPlugin, useRequestHeaders, useRuntimeConfig } from '#imports'
+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 baseURL = process.server ? '' : config.baseURL
+  const client = trpc.createTRPCClient<AppRouter>({
+    url: `${baseURL}${config.endpoint}`,
+    headers: () => {
+      return {
+        ...unref(otherHeaders),
+        ...headers,
+      }
+    },
+    fetch: (input, options) =>
+      globalThis.$fetch.raw(input.toString(), options)
+        .catch((e) => {
+          if (e instanceof FetchError && e.response)
+            return e.response
+
+          throw e
+        })
+        .then(response => ({
+          ...response,
+          json: () => Promise.resolve(response._data),
+        })),
+  })
+
+  nuxtApp.provide('client', client)
+})
+
+declare module '#app' {
+  interface NuxtApp {
+    $client: trpc.TRPCClient<AppRouter>
+  }
+}

tsconfig.json

@@ -1,16 +1,3 @@
 {
-  "compilerOptions": {
+  "extends": "./playground/.nuxt/tsconfig.json"
-    "target": "es2020",
-    "module": "esnext",
-    "strict": true,
-    "esModuleInterop": true,
-    "moduleResolution": "node",
-    "skipLibCheck": true,
-    "noUnusedLocals": true,
-    "noImplicitAny": true,
-    "allowJs": true,
-    "noEmit": true,
-    "resolveJsonModule": true,
-    "skipDefaultLibCheck": true
-  }
 }

tsup.config.ts

@@ -1,15 +0,0 @@
-import { defineConfig } from 'tsup'
-
-export default defineConfig({
-  entry: ['src/index.ts'],
-  format: ['cjs', 'esm'],
-  splitting: false,
-  clean: true,
-  external: ['#app', '#imports'],
-  dts: true,
-  outExtension ({ format }) {
-    return {
-      js: format === 'esm' ? '.mjs' : `.${format}`
-    }
-  }
-})