To implement nested routes in a React application using React Router v6+, follow these steps:
1. Define Routes with Nesting
Use <Routes> and nested <Route> components:
import { BrowserRouter, Routes, Route } from "react-router-dom";
import Dashboard from "./Dashboard";
import Profile from "./Profile";
import Settings from "./Settings";
function App() {
  return (
    <BrowserRouter>
      <Routes>
        <Route path="dashboard" element={<Dashboard />}>
          <Route path="profile" element={<Profile />} />
          <Route path="settings" element={<Settings />} />
        </Route>
      </Routes>
    </BrowserRouter>
  );
}
2. Render <Outlet /> in Parent Component
Inside Dashboard.js, render child components via <Outlet />:
import { Outlet } from "react-router-dom";
function Dashboard() {
  return (
    <div>
      <h2>Dashboard</h2>
      <Outlet /> {/* Renders nested routes */}
    </div>
  );
}
export default Dashboard;