Simplified button

chapter08/src/App.routing.js

@@ -17,6 +17,7 @@ class App extends Component<{}> {
                         <ConnectedProtectedRoutes>
                             <Route
                                 path="/"
+                                exact
                                 render={() => <div>HOME SWEET HOME</div>}
                             />
                             <Route

chapter08/src/routingApp/login.component.js

@@ -50,11 +50,12 @@ export class Login extends React.PureComponent<{
                             onBlur={this.onPasswordBlur}
                         />
                     </div>
-                    {this.props.logging ? (
-                        "Logging in..."
-                    ) : (
-                        <button onClick={this.onLoginClick}>Login</button>
-                    )}
+                    <button
+                        onClick={this.onLoginClick}
+                        disabled={this.props.logging}
+                    >
+                        Login
+                    </button>
                 </div>
             );
         }