個人用のメモです。

version

$ npm -v
8.19.1
$ yarn -v
1.22.19
$ node -v
v16.15.1

プロジェクトの作成

$ npm create vite@latest
Need to install the following packages:
  create-vite@3.1.0
Ok to proceed? (y) y
✔ Project name: … react-bootstrap-sample1
✔ Select a framework: › React
✔ Select a variant: › JavaScript

Scaffolding project in /mnt/d/github/react/react-bootstrap-sample1...

Done. Now run:

  cd react-bootstrap-sample1
  npm install
  npm run dev

$ cd react-bootstarap-sample1
$ yarn add bootstrap @popperjs/core bootstrap-icons

src/main.jsx

src/main.jsx

import React from 'react'
import ReactDOM from 'react-dom/client'
import App from './App'
import "bootstrap"; // 追加
import "bootstrap/dist/css/bootstrap.min.css"; // 追加
import "bootstrap-icons/font/bootstrap-icons.css"; // 追加
//import './index.css' // コメントアウト

ReactDOM.createRoot(document.getElementById('root')).render(
  <React.StrictMode>
    <App />
  </React.StrictMode>
)

src/App.jsx

ページの内容は、公式にあるSticky footer with fixed navbarの内容をほぼコピペしただけです。

src/App.jsx

import { useState } from 'react'
import reactLogo from './assets/react.svg'

function App() {
  const [count, setCount] = useState(0)

  return (
        <div>
    <header>
      <nav class="navbar navbar-expand-md navbar-dark bg-dark">
        <div class="container-fluid">
          <a class="navbar-brand" href="#">Navbar</a>
          <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
            <span class="navbar-toggler-icon"></span>
          </button>
          <div class="collapse navbar-collapse" id="navbarSupportedContent">
            <ul class="navbar-nav me-auto mb-2 mb-lg-0">
              <li class="nav-item">
                <a class="nav-link active" aria-current="page" href="#">Home</a>
              </li>
              <li class="nav-item">
                <a class="nav-link" href="#">Link</a>
              </li>
              <li class="nav-item dropdown">
                <a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-bs-toggle="dropdown" aria-expanded="false">
                  Dropdown
                </a>
                <ul class="dropdown-menu" aria-labelledby="navbarDropdown">
                  <li><a class="dropdown-item" href="#">Action</a></li>
                  <li><a class="dropdown-item" href="#">Another action</a></li>
                  <li><hr class="dropdown-divider"/></li>
                  <li><a class="dropdown-item" href="#">Something else here</a></li>
                </ul>
              </li>
              <li class="nav-item">
                <a class="nav-link disabled" href="#" tabindex="-1" aria-disabled="true">Disabled</a>
              </li>
            </ul>
            <form class="d-flex">
              <input class="form-control me-2" type="search" placeholder="Search" aria-label="Search"/>
              <button class="btn btn-outline-success" type="submit">Search</button>
            </form>
          </div>
        </div>
      </nav>
    </header>
    <main class="flex-shrink-0">
      <div class="container">
        <h1 class="mt-1">Sticky footer with fixed navbar</h1>
        <p class="lead">Pin a footer to the bottom of the viewport in desktop browsers with this custom HTML and CSS. A fixed navbar has been added with <code class="small">padding-top: 60px;</code> on the <code class="small">main &gt; .container</code>.</p>
        <p>Back to <a href="/docs/5.0/examples/sticky-footer/">the default sticky footer</a> minus the navbar.</p>
      </div>
    </main>

    <footer class="footer mt-auto py-3 bg-light">
      <div class="container">
        <span class="text-muted">Place sticky footer content here.</span>
      </div>
    </footer>
    </div>
  )
}

export default App

これで yarn dev して http://localhost:5173/ をブラウザで開きます。

おまけ

Vue.jsでの書き方はReact.jsではどう書くのか？