feat: add refresh token container and instructions for offline access

README.md

@@ -111,3 +111,25 @@ yarn start
 ```
 
 Your application will then run on `http://localhost:3000`
+
+## Enable Offline Access (Refresh Tokens)
+
+To retrieve a refresh token for offline access, follow these steps:
+
+1. Enable refresh tokens for your application:  
+   - Navigate to your [application settings](https://zitadel.com/docs/guides/manage/console/applications#application-settings) and enable the **Refresh Token** checkbox.
+
+2. Add the `offline_access` scope:
+
+```js
+const config: ZitadelConfig = {
+    authority: "https://CUSTOM_DOMAIN",
+    client_id: "YOUR_CLIENT_ID",
+    redirect_uri: "http://localhost:3000/callback",
+    post_logout_redirect_uri: "http://localhost:3000",
+    response_type: 'code',
+    scope: 'openid profile email offline_access'
+};
+```
+
+3. After logging out and logging back in, you will see the refresh token container displaying the refresh token.

src/App.tsx

@@ -2,7 +2,7 @@ import { useEffect, useState } from "react";
 import "./App.css";
 import { createZitadelAuth, ZitadelConfig } from "@zitadel/react";
 import { BrowserRouter, Route, Routes } from "react-router-dom";
-import Navbar from "./components/Navbar"
+import Navbar from "./components/Navbar";
 
 import Login from "./components/Login";
 import Callback from "./components/Callback";
@@ -32,17 +32,20 @@ function App() {
   const [authenticated, setAuthenticated] = useState<boolean | null>(null);
   const [accessToken, setAccessToken] = useState<string | null>(null);
   const [idToken, setIdToken] = useState<string | null>(null);
+  const [refreshToken, setRefreshToken] = useState<string | null>(null);
 
   useEffect(() => {
     zitadel.userManager.getUser().then((user) => {
       if (user) {
         setAuthenticated(true);
         setAccessToken(user.access_token ?? null);
         setIdToken(user.id_token ?? null);
+        setRefreshToken(user.refresh_token ?? null);
       } else {
         setAuthenticated(false);
         setAccessToken(null);
         setIdToken(null);
+        setRefreshToken(null);
       }
     });
   }, [zitadel]);
@@ -53,7 +56,7 @@ function App() {
         <BrowserRouter>
           <Navbar />
           <Login authenticated={authenticated} handleLogin={login} handleLogout={logout} />
-          <JWTContainer accessToken={accessToken} idToken={idToken} />
+          <JWTContainer accessToken={accessToken} idToken={idToken} refreshToken={refreshToken} />
           <Routes>
             <Route
               path="/callback"

src/components/JWTContainer.tsx

@@ -3,35 +3,28 @@ import { useState } from "react";
 type Props = {
     accessToken: string | null;
     idToken: string | null;
+    refreshToken?: string | null;
 };
 
 function decodeJWT(jwt: string) {
-    // Split the JWT into its three parts: header, payload, and signature
     const parts = jwt.split('.');
-
     if (parts.length !== 3) {
         console.log("Token is not in JWT format");
         return jwt;
     }
-
-    // The payload is the second part (index 1)
     const payloadBase64 = parts[1];
-
-    // Decode the base64-encoded payload
     const decodedPayload = atob(payloadBase64.replace(/_/g, '/').replace(/-/g, '+'));
-
-    // Parse the JSON string into an object
     const payloadObj = JSON.parse(decodedPayload);
-
     return payloadObj;
 }
 
-const JWTContainer = ({ accessToken, idToken }: Props) => {
+const JWTContainer = ({ accessToken, idToken, refreshToken }: Props) => {
     const decodedAccessToken = accessToken ? JSON.stringify(decodeJWT(accessToken), null, 2) : null;
     const decodedIdToken = idToken ? JSON.stringify(decodeJWT(idToken), null, 2) : null;
 
     const [copyState, setCopyState] = useState<{ [key: string]: boolean }>({});
-    const handleCopy = (target: "accessToken" | "idToken", text: string) => {
+
+    const handleCopy = (target: "accessToken" | "idToken" | "refreshToken", text: string) => {
         navigator.clipboard.writeText(text).then(() => {
             setCopyState((prev) => ({ ...prev, [target]: true }));
             setTimeout(() => {
@@ -48,8 +41,7 @@ const JWTContainer = ({ accessToken, idToken }: Props) => {
                         Access Token
                         {accessToken && (
                             <i
-                                className={`fas fa-copy copy-btn ${copyState.accessToken ? "text-success" : "text-primary"
-                                    }`}
+                                className={`fas fa-copy copy-btn ${copyState.accessToken ? "text-success" : "text-primary"}`}
                                 style={{ cursor: "pointer" }}
                                 onClick={() => handleCopy("accessToken", accessToken)}
                             ></i>
@@ -59,15 +51,31 @@ const JWTContainer = ({ accessToken, idToken }: Props) => {
                         <pre id="access-token" className="jwt-box">{decodedAccessToken || "No token generated yet."}</pre>
                     </div>
                 </div>
+
+                {refreshToken && (
+                    <div className="card mb-3 shadow-sm">
+                        <div className="card-header fw-bold d-flex justify-content-between align-items-center">
+                            Refresh Token
+                            <i
+                                className={`fas fa-copy copy-btn ${copyState.refreshToken ? "text-success" : "text-primary"}`}
+                                style={{ cursor: "pointer" }}
+                                onClick={() => handleCopy("refreshToken", refreshToken)}
+                            ></i>
+                        </div>
+                        <div className="card-body">
+                            <pre id="refresh-token" className="jwt-box">{refreshToken}</pre>
+                        </div>
+                    </div>
+                )}
             </div>
+
             <div className="col-md-6">
                 <div className="card mb-3 shadow-sm">
                     <div className="card-header fw-bold d-flex justify-content-between align-items-center">
                         ID Token
                         {idToken && (
                             <i
-                                className={`fas fa-copy copy-btn ${copyState.idToken ? "text-success" : "text-primary"
-                                    }`}
+                                className={`fas fa-copy copy-btn ${copyState.idToken ? "text-success" : "text-primary"}`}
                                 style={{ cursor: "pointer" }}
                                 onClick={() => handleCopy("idToken", idToken)}
                             ></i>
@@ -82,4 +90,4 @@ const JWTContainer = ({ accessToken, idToken }: Props) => {
     );
 };
 
-export default JWTContainer;
+export default JWTContainer;