Nuxt JWT Auth

A Nuxt module to authenticate on a custom backend (Laravel) via jwt token.

• ✨  Release Notes

Features

• 🔌 Manage login, logout, protected api requests with $jwtAuth plugin
• 🪝 Access to user data with useJwtAuth composable
• 🖥️ Works also in SSR mode
• ❤️ Heavily inspired by the awesome nuxt-sanctum-auth

Quick Setup

1. Add nuxt-jwt-auth dependency to your project

# Using pnpm
pnpm add -D nuxt-jwt-auth

# Using yarn
yarn add --dev nuxt-jwt-auth

# Using npm
npm install --save-dev nuxt-jwt-auth

2. Add nuxt-jwt-auth to the modules section of nuxt.config.ts

// nuxt.config.ts

export default defineNuxtConfig({
  modules: [
    'nuxt-jwt-auth'
  ]
})

3. Add configuration object nuxt-jwt-auth

// nuxt.config.ts

export default defineNuxtConfig({
  // ...
  nuxtJwtAuth: {
    baseUrl: 'http://homestead.test/api', // URL of your backend
    endpoints: {
      login: '/login', // Where to request login (POST)
      logout: '/logout', // Where to request logout (POST)
      user: '/user', // Where to request user data (GET)
      signup: '/signup' // Where to request signup (POST)
    },
    redirects: {
      home: '/', // Where to redirect after successfull login and logout
      login: '/login', // Where to redirect if user is not logged in and accesses a logged-only route
      logout: '/logout' // Where to redirect if user is logged in and accesses a guest-only route 
    }
  }
})

How to use

Login

This modules provides the $jwtAuth plugin, which contains login and logout methods.

Login function accepts credentials, which are passed as-is to the backend, as first argument. You can optionally provide a callback function as second argument. This function will receive the response from the backend.

If no callback function is provided, the user will be redirected to the home route specified in configuration after successful login.

<script setup>
const { $jwtAuth } = useNuxtApp()
const router = useRouter()

async function login() {
  try {
    await $jwtAuth.login(
      {
        email: '[email protected]',
        password: 'supersecretpassword'
      },
      // optional callback function
      (data) => {
        console.log(data)
        window.location.replace('/')
      }
    )
  } catch (e) {
    // your error handling
  }
}
</script>

⚠️ If using custom callback function, you must always navigate to another route using window.location.replace(). Some auth data may not be updated if navigating "in-app" with router.push() or nuxt's navigateTo()

⚠️ It is requested that the backend responds to the login request with a JSON object containing both token and user properties:

{
  "token": "1|TjVJavoOkerwXViiRwLBLsd1xGSRoYosiO87zSEr",
  "user": {
    "name": "Mario",
    "surname": "Rossi",
    "address": "Fake St. 123"
  }
}

---

Signup

This modules provides the $jwtAuth plugin, which contains signup method.

Signup function accepts registration data, which are passed as-is to the backend, as first argument. You can optionally provide a callback function as second argument. This function will receive the response from the backend.

If no callback function is provided, the user will be redirected to the home route specified in configuration after successful signup.

<script setup>
const { $jwtAuth } = useNuxtApp()
const router = useRouter()

async function signup() {
  try {
    await $jwtAuth.signup(
      {
        username: 'Mario Rossi',
        email: '[email protected]',
        password: 'supersecretpassword',
        password_confirm: 'supersecretpassword'
      },
      // optional callback function
      (data) => {
        console.log(data)
        router.push('/account')
      }
    )
  } catch (e) {
    // your error handling
  }
}
</script>

Please note that it is requested that the backend responds to the signup request with a JSON object containing both token and user properties:

{
  "token": "1|TjVJavoOkerwXViiRwLBLsd1xGSRoYosiO87zSEr",
  "user": {
    "name": "Mario",
    "surname": "Rossi",
    "address": "Fake St. 123"
  }
}

---

Route middlewares

This modules provides two route middleware you can optionally add to pages.

auth

Use this middleware in pages where user must be logged in (such as /account)

<script setup>
definePageMeta({
  middleware: 'auth'
})
</script>

guest

Use this middleware in pages where user must not be logged in (such as /login)

<script setup>
definePageMeta({
  middleware: 'guest'
})
</script>

---

Get the user (useJwtAuth)

This modules provides the useJwtAuth composable, which you can use to obtain useful auth-related data, such as user, token, loggedIn state.

⚠️ All variables obtained from useJwtAuth are computed properties, to reflect changes in cookie data.

<template>
  <h1>Hello,</h1>
  <h2 v-if="loggedIn">{{user.name}}</h2>
</template>

<script setup>
const { user, loggedIn } = useJwtAuth()

</script>

ℹ️ If using typescript, you can specify the user type!

<script setup lang="ts">

interface User {
  name: string
}  
  
const { user, loggedIn } = useJwtAuth<User>()
  
console.log('user name is', user.name) // user.name is of type string now 

</script>

---

Protected data fetch (fetch)

By using the fetch function of $jwtAuth plugin, you can send standard api requests to the backend.

<script setup>
const { $jwtAuth } = useNuxtApp()

async function fetchMyData() {
  try {
    const myData = await $jwtAuth.fetch('my-api-route')
    // do something with received data...
  } catch (e) {
    // your error handling
  }
}
</script>

---

Logout

This modules provides the $jwtAuth plugin, which contains login and logout methods.

<script setup>
const { $jwtAuth } = useNuxtApp()

async function logout() {
  try {
    await $jwtAuth.logout()
  } catch (e) {
    // your error handling
  }
}
</script>

---

Setting cookie data externally

In special cases, you can manage authentication externally and set token and user data by using setUser, setToken or setTokenAndUser functions.

<script setup>
const { $jwtAuth } = useNuxtApp()

async function externalLogin() {
  try {
    // special login executed externally

    const token = "1|TjVJavoOkerwXViiRwLBLsd1xGSRoYosiO87zSEr"
    const user = {
      "name": "Mario",
      "surname": "Rossi",
      "address": "Fake St. 123"
    }
    
    $jwtAuth.setToken(token)
    $jwtAuth.setUser(user)

    // same as
    $jwtAuth.setTokenAndUser({
      token,
      user
    })
    
  } catch (e) {
    // your error handling
  }
}
</script>

---

Known issues

Layouts

User data displayed in the nuxt layout (ex. username on the right of an app bar) is not updated until a full server page reload. So, if you provide a callback to the login method and in this callback you push to another route (on the client), user data will not be displayed in the layout.

This is a bug/feature of nuxt itself, which does not refresh layouts data when navigating on the client.

To solve this, add key argument to nuxt-layout:

<nuxt-layout :key="$route.path">
  <nuxt-page />
</nuxt-layout>

Development

# Install dependencies
npm install

# Generate type stubs
npm run dev:prepare

# Develop with the playground
npm run dev

# Build the playground
npm run dev:build

# Run ESLint
npm run lint

# Run Vitest
npm run test
npm run test:watch

# Release new version
npm run release