React Router Issue: Component Not Rendering When <nav> Element Is Incomplete

I am currently experiencing an issue with rendering a component in my React TypeScript application using React Router. The problem arises when trying to navigate to the AddTask component by clicking on a link within a <nav> element. Strangely, the component only renders successfully if the <nav> covers the entire application and fails otherwise when I attempt to modify the code by removing or replacing the wrapper.

I would appreciate any insights or suggestions on how to overcome this obstacle. Are there specific configurations or modifications that need to be made to ensure the proper rendering of the AddTask component without having the <nav> dominate the entire application?

The following code snippet displays a simple navbar:

import { Component } from 'react';
import { Routes, Route, Link } from "react-router-dom";
import "bootstrap/dist/css/bootstrap.min.css";
import 'bootstrap/dist/js/bootstrap.js';
import AddTask from './components/addtask';
import './App.css';

class App extends Component{
  render() {
    return (
      <nav className="navbar navbar-expand navbar-dark bg-dark">
        <div className="navbar-nav mr-auto">
          <a className="navbar-brand" href="#">Add</a>
        </div>
      </nav>
    );
  }
}

export default App;

However, when the code is modified as shown below, it fails to render:

import React, { Component } from 'react';
import { BrowserRouter as Router, Routes, Route, Link } from 'react-router-dom';
import 'bootstrap/dist/css/bootstrap.min.css';
import 'bootstrap/dist/js/bootstrap.js';
import AddTask from './components/addtask';
import './App.css';

class App extends Component {
  render() {
    return (
      <div>
        <nav className="navbar navbar-expand navbar-dark bg-dark">
          <div className="navbar-nav mr-auto">
            <Link to="/add" className="navbar-brand">Add</Link>
          </div>
        </nav>
        <Router>
          <Routes>
            <Route path="/add" element={<AddTask />} />
          </Routes>
        </Router>
      </div>
    );
  }
}

export default App;

Answer №1

Problem

The issue that stands out in the code and can be replicated in a live sandbox is the Link element being rendered outside of a routing context.

class App extends Component {
  render() {
    return (
      <div>
        <nav className="navbar navbar-expand navbar-dark bg-dark">
          <div className="navbar-nav mr-auto">
            <Link // <-- (2) No routing context provided from higher up
              to="/add"
              className="navbar-brand"
            >
              Add
            </Link>
          </div>
        </nav>
        <Router> // <-- (1) Provides routing context
          <Routes>
            <Route path="/add" element={<AddTask />} />
          </Routes>
        </Router>
      </div>
    );
  }
}

Solution

Enclose the nav element within the Router component so that the Link components it generates have access to a routing context from further up the ReactTree.

Here's an example:

class App extends Component {
  render() {
    return (
      <div>
        <Router>
          <nav className="navbar navbar-expand navbar-dark bg-dark">
            <div className="navbar-nav mr-auto">
              <Link to="/add" className="navbar-brand">Add</Link>
            </div>
          </nav>
          <Routes>
            <Route path="/add" element={<AddTask />} />
          </Routes>
        </Router>
      </div>
    );
  }
}

https://codesandbox.io/s/elegant-christian-3zgx78?fontsize=14&hidenavigation=1&module=%2Fsrc%2FApp.js&theme=dark

https://i.stack.imgur.com/RrYcx.png

Answer №2

It's recommended in the documentation not to directly use the Router component. Instead, opt for either BrowserRouter or HashRouter.

The Router components serve as the foundation for React Router, so it is essential that all React Router components are enclosed within one of them. Ideally, the router should encompass your entire application structure. For example:

return (
  <BrowserRouter>
    <div>
      <nav className="navbar navbar-expand navbar-dark bg-dark">
        <div className="navbar-nav mr-auto">
          <Link to="/add" className="navbar-brand">Add</Link>
        </div>
      </nav>
      <Routes>
        <Route path="/add" element={<AddTask />} />
      </Routes>
    </div>
  </BrowserRouter>
);

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