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React

This packages provides Hellō button components that you can use in a React SPA.

Setup

To add Hellō to your React application, in your project directory:

Install the package

npm i @hellocoop/react

Add Hellō stylesheet

To provide the button styling, add the below code to the <head> section of the index.html:

<link rel="stylesheet" href="https://cdn.hello.coop/css/hello-btn.css"/>

Components

import { 
    ContinueButton, 
    LoginButton, 
    UpdateProfileButton,
    LoggedIn,
    LoggedOut,
    HelloProvider,
    useAuth,
    logOut,
    getLogOutRoute
} from '@hellocoop/react'

Buttons

<ContinueButton/> - provides [ ō Continue with Hellō ]

<LoginButton/> - provides [ ō Login with Hellō ]

<UpdateProfileButton/> - provides [ ō Update Profile with Hellō ]

Optional properties:

  • scope - Array of Hellō scope values. Default ['openid', 'email', 'name', 'picture'].
  • targetURI - defaults to HELLO_DEFAULT_TARGET_ROUTE or ’/’
  • providerHint - Array of provider hints. Example ['github', 'gitlab', 'email--', 'apple--', 'microsoft--'] would always recommend GitHub, GitLab, and Google.
  • loginHint - A hint for which user account to use. Example name@domain.example.
  • domainHint - A hint for the domain of the user’s managed account. Example domain.example.
  • promptLogin - defaults to false. Will require the user to re-authenticate at their login provider.
  • promptConsent - defaults to false. Will require the user to review, and potentially change, released claims.

Optional button styling properties:

  • color - white | black
  • theme - ignore-light | ignore-dark | aware-invert | aware-static
  • hover - pop | glow | flare | none

Explore styling with the button playground

Login Status Components

<LoggedIn> - renders children only when user is logged in

<LoggedOut> - renders children only when user is logged out

<LoggedIn>
    <div>Welcome back!</div>
</LoggedIn>
<LoggedOut>
    <ContinueButton />
</LoggedOut>

useAuth() Hook

Hook to get authentication state and user information.

const { auth, isLoading, isLoggedIn } = useAuth()
 
// auth contains:
// - isLoggedIn: boolean
// - sub: string (user identifier)
// - name: string
// - email: string
// - picture: string
// - iat: number (issued at timestamp)

Logout Functions

logOut(params) - redirects to logout route

getLogOutRoute(params) - returns logout route URL

import { logOut, getLogOutRoute } from '@hellocoop/react'
 
// Redirect to logout
logOut({ target_uri: '/' })
 
// Get logout URL for Link component
const logoutUrl = getLogOutRoute({ target_uri: '/' })

<HelloProvider/>

By default, clicking the Hellō button would redirect to /api/hellocoop?op=login endpoint with the optional properties as additional query parameters. To override this behavior, wrap your app with the <HelloProvider/> component and pass the config object as a prop to the provider.

Props:

  • children - React children components
  • auth - Auth object (optional, for server-side rendered auth)
  • config - Route configuration (optional)
App.jsx
import { HelloProvider } from '@hellocoop/react';
 
// Default configuration
const config = {
    login: '/api/hellocoop?op=login',
    auth: '/api/hellocoop?op=auth',
    logout: '/api/hellocoop?op=logout'
}
 
export default function App({ auth }) {
    return (
        <HelloProvider auth={auth} config={config}>
            <main>
                <LoggedIn>
                    <div>Welcome {auth?.name}!</div>
                </LoggedIn>
                <LoggedOut>
                    <ContinueButton />
                </LoggedOut>
            </main>
        </HelloProvider>
    )
}

Complete Example

Here’s a complete example showing how to use all the components together:

App.jsx
import React from 'react'
import { 
    HelloProvider,
    LoggedIn, 
    LoggedOut, 
    ContinueButton, 
    LoginButton,
    UpdateProfileButton,
    useAuth,
    logOut,
    getLogOutRoute
} from '@hellocoop/react'
 
function UserProfile() {
    const { auth, isLoading, isLoggedIn } = useAuth()
    
    if (isLoading) return <div>Loading...</div>
    
    return (
        <div>
            {isLoggedIn ? (
                <div>
                    <img src={auth.picture} alt={auth.name} />
                    <h2>Welcome {auth.name}!</h2>
                    <p>{auth.email}</p>
                    <button onClick={() => logOut({ target_uri: '/' })}>
                        Logout
                    </button>
                    <UpdateProfileButton targetURI="/profile" />
                </div>
            ) : (
                <div>
                    <ContinueButton targetURI="/dashboard" />
                    <LoginButton targetURI="/dashboard" />
                </div>
            )}
        </div>
    )
}
 
export default function App() {
    return (
        <HelloProvider>
            <UserProfile />
        </HelloProvider>
    )
}
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