React 在单个 Routes 元素中渲染多个 Route 元素

Question

I cant seem to render multiple Route elements in a single Routes element. I would like to have a multiple Route elements in a single Routes element since they are both updated dynamically. Does the old syntax/style not work?

Code example:

import React from 'react';
import './App.css';
import Header from './Header';
import Home from './Home';
import {BrowserRouter as Router, Route, Routes} from 'react-router-dom';

function App() {
  return (
    // use BEM naming convention
    <Router>
      <div className="app">
        <Routes>
          {/* This one works */}
          {/* <Route path="/" element={<><Header /><Home /></>} /> */}

          {/* But this doesnt: */}
          <Route path="/" element={<Header />} />
          <Route path="/" element={<Home />} />

        </Routes>
      </div>
    </Router>
  );
}

export default App;

Answer 1

There should be only one Route per path you want to match. In react-router-dom@6 all routes are exclusively matched, the Routes component serves a similar purpose to, and is the spiritual successor of, the RRDv5 Switch component.

If you are trying to render common UI logic/components then the recommended way is to use what are called Layout Routes that renders the common logic/UI and an Outlet component for nested Route components to render their element into.

If you want to render a Header component on specific routes then create a layout component that renders the Header and Outlet and wrap the routes you want to render with Header .

Example:

import { Outlet } from 'react-router-dom';
import Header from '../path/to/Header';

const HeaderLayout = () => (
  <>
    <Header />
    <Outlet /> // <-- nested routes render content here
  </>
);

export default HeaderLayout;

...

import React from 'react';
import './App.css';
import HeaderLayout from './HeaderLayout';
import Home from './Home';
import {BrowserRouter as Router, Route, Routes} from 'react-router-dom';

function App() {
  return (
    // use BEM naming convention
    <Router>
      <div className="app">
        <Routes>
          <Route element={<HeaderLayout />}>
            <Route path="/" element={<Home />} /> // <-- nested route
            ... other routes with Header
          </Route>

          ... other routes w/o Header
        </Routes>
      </div>
    </Router>
  );
}