React Keycloak

React bindings for Keycloak

Install

React Keycloak requires:

React 16.0 or later
keycloak-js 8.0.1 or later

yarn add @react-keycloak/web

npm install --save @react-keycloak/web

Getting Started

Setup KeycloakProvider

Wrap your App inside KeycloakProvider and pass a keycloak instance as prop

import Keycloak from 'keycloak-js';
import { KeycloakProvider } from '@react-keycloak/web';

// Setup Keycloak instance as needed
const keycloak = new Keycloak();

// Wrap everything inside KeycloakProvider
const App = () => {
  return <KeycloakProvider keycloak={keycloak}>...</KeycloakProvider>;
};

N.B. If your using other providers (such as react-redux) it is recommended to place them inside KeycloakProvider.

KeycloakProvider automatically invokes keycloak.init() method when needed and supports the following props:

initConfig, contains the object to be passed to keycloak.init() method, by default the following is used
```
{
  onLoad: 'check-sso',
  promiseType: 'native',
}
```
for more options see Keycloak docs.
LoadingComponent, a component to be displayed while keycloak is being initialized, if not provided child components will be rendered immediately. Defaults to null
isLoadingCheck, an optional loading check function to customize LoadingComponent display condition. Return true to display LoadingComponent, false to hide it.

Can be implemented as follow
```
  keycloak => !keycloak.authenticated;
```
onEvent, an handler function that receives events launched by keycloak, defaults to null.

It can be implemented as follow
```
  (event, error) => {
    console.log('onKeycloakEvent', event, error);
  }
```
Published events are:
- onReady
- onAuthSuccess
- onAuthError
- onAuthRefreshSuccess
- onAuthRefreshError
- onTokenExpired
- onAuthLogout
onTokens, an handler function that receives keycloak tokens as an object every time they change, defaults to null.

Keycloak tokens are returned as follow
```
{
  "idToken": string,
  "refreshToken": string,
  "token": string,
}
```

HOC Usage

When a component requires access to Keycloak, wrap it inside the withKeycloak HOC.

import { withKeycloak } from '@react-keycloak/web';

const LoginPage = ({ keycloak, keycloakInitialized }) => {
  // Here you can access all of keycloak methods and variables.
  // See https://www.keycloak.org/docs/latest/securing_apps/index.html#javascript-adapter-reference
  return (
    <div>
      <button type="button" onClick={() => keycloak.login()}>
        Login
      </button>
    </div>
  );
};

export default withKeycloak(LoginPage);

Hook Usage (React >=16.8 required)

Alternately, when a component requires access to Keycloak, you can also use the useKeycloak Hook.

import { useKeycloak } from '@react-keycloak/web';

export default () => {
  // Using array destructuring
  const [keycloak, initialized] = useKeycloak();
  // or Object destructuring
  const { keycloak, initialized } = useKeycloak();

  // Here you can access all of keycloak methods and variables.
  // See https://www.keycloak.org/docs/latest/securing_apps/index.html#javascript-adapter-reference

  return (
    <div>
      <div>{`User is ${!keycloak.authenticated ? 'NOT ' : ''}authenticated`}</div>

      {!!keycloak.authenticated && (
        <button type="button" onClick={() => keycloak.logout()}>
          Logout
        </button>
      )}
    </div>
  );
};