Handling Google Auth2 sign-in and sign-out

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18511.5.10a year ago6 years agoMinified + gzip package size for vue-google-oauth2 in KB


DEPRECATED - no longer actively maintained
This plugin does not support the new Google authentication system(GIS). You need to migrate by referring to this document.
Handling Google sign-in and sign-out for Vue.js applications.
npm bundle size GitHub vue-google-oauth2
We support TypeScript and Nuxt. 😎 For Vue3 applications, please refer to here
Front-end Demo


Installation with npm

npm install vue-google-oauth2

Installation with yarn

yarn add vue-google-oauth2


import GAuth from 'vue-google-oauth2'
const gauthOption = {
  clientId: '',
  scope: 'profile email',
  prompt: 'select_account'
Vue.use(GAuth, gauthOption)
Please Don't use plus.login scope. It will be deprecated.

Initialization for Nuxt

  1. creates plug-in file for nuxt
// plugins/vue-google-oauth2.js
// file name can be changed to whatever you want
import Vue from 'vue'
import GAuth from 'vue-google-oauth2'

const gauthOption = {
  clientId: '',
  scope: 'profile email',
  prompt: 'select_account'
Vue.use(GAuth, gauthOption)

  1. adds plugin to nuxt config file
plugins: [




| Property | Type | Required | Description | |--------------|----------|-----------------|-----------------| | clientId | String | Required. | The app's client ID, found and created in the Google Developers Console. | | scope | String | Optional. | Default value is profile email. Full list of scopes. | | prompt | String | Optional. | This value using for authCode. The possible values are select_account or consent. Default value is select_account. To get refresh token from auth code, use consent.| | fetchbasicprofile | Boolean | Optional. | If set to true, email profile openid will be automatically added as scope. Default value is true. |


| Property | Description | Type | |--------------|--------------------|----------| | GoogleAuth | return of gapi.auth2.getAuthInstance() | Object | | isAuthorized | Whether or not you have auth | Boolean | | isInit | Whether or not api init | Boolean | | isLoaded | Whether or not api init. will be deprecated. | Function | | signIn | function for sign-in | Function | | getAuthCode | function for getting authCode | Function | | signOut | function for sign-out | Function |


Getting authorization code

The authCode that is being returned is the one-time code that you can send to your backend server, so that the server can exchange for its own accesstoken and refreshtoken.
The access_token and refresh_token can be saved in backend storage for reuse and refresh. In this way, you can avoid exposing your api key or secret key whenever you need to use various google APIs.
const authCode = await this.$gAuth.getAuthCode()
const response = await this.$'http://your-backend-server-api-to-use-authcode', { code: authCode, redirect_uri: 'postmessage' })

: Directly get back the access_token and id_token

const googleUser = await this.$gAuth.signIn()
// googleUser.getId() : Get the user's unique ID string.
// googleUser.getBasicProfile() : Get the user's basic profile information.
// googleUser.getAuthResponse() : Get the response object from the user's auth session. access_token and so on
this.isSignIn = this.$gAuth.isAuthorized

refer to google signIn reference : GoogleUser


Handling Google sign-out
const response = await this.$gAuth.signOut()

Extra - Directly get access_token and refresh_token on Server-side

To get access_token and refresh_token in server side, the data for redirect_uri should be postmessage. postmessage is magic value for redirect_uri to get credentials without actual redirect uri.


curl -d "client_id=YOUR_CLIENT_ID&\

Sample Code

Additional Help

Google Sign-in Flow


The failure of initialization happens

You can check the brower console to check errors which occur during initialization. The most of errors are from inproper setting of google oauth2 credentials setting in Google Developer Console. After changing the settings, you have to do hard refresh to clear your caches.

Type Errors

Follow the documentation provided here to add $gAuth as a property for preventing lint errors.