Can I use React Bootstrap with Next.js?

Yes, I am using it!
You can follow egdavid's answer to configure react-bootstrap.

The only issue I found is that links are not working properly in terms of SPA.
For that, I found the below solution. You have to wrap NavBar.Link within Link and use passHref attribute if you want to visible hyperlink on the link.

<Link href="/" passHref>
    <Nav.Link>Home</Nav.Link>
</Link>
<Link href="/contact" passHref>
    <Nav.Link>Contact</Nav.Link>
</Link>

Yes you can use it. I think the most important issue is that server-side rendering supported in combination of next js & react-bootstrap? yes in react-bootstrap docs you can see how to implement this option.

https://react-bootstrap.github.io/docs/getting-started/server-side-rendering

you could do it something like this:

import SSRProvider from 'react-bootstrap/SSRProvider';

   <SSRProvider>
     <App />
   </SSRProvider>

yes , you can use bootstrap and react-bootstrap inside next.js.

and i am use it inside my applications ,

and here is a simple example to use navbar and modal component just for testing ..

1- first install "react-bootstrap bootstrap" by using the follwing commands :

npm install react-bootstrap bootstrap

2- inside "_app.js" file import bootstrap css file on the top of file , and bootstrap js file inside useEffect , like the following :

import { useEffect } from 'react';
import Nav from '../components/nav'
import 'bootstrap/dist/css/bootstrap.css';


function MyApp({ Component, pageProps }) {
    
    useEffect(() => {
        require ('bootstrap/dist/js/bootstrap.js')
    }, []);

  return (
    <>
        <Nav />
        <Component {...pageProps} />  
    </>
 
  )
}

3- and here is the my Nav component for testing (compatible with bootstrap 5) ... :

import { useState } from "react";
import {Modal, Button} from 'react-bootstrap';

const Nav = () => {
    const [show, setShow] = useState(false);
    const handleClose = () => setShow(false);
    const handleShow = () => setShow(true);

    const confirm_modal = () => {
        console.log('modal is working ...')
        setShow(false)
    }

    return(
        <>

<nav className="navbar navbar-expand-lg navbar-light bg-light">
  <div className="container-fluid">
    <a className="navbar-brand" href="#">Navbar</a>
    <button className="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
      <span className="navbar-toggler-icon"></span>
    </button>
    <div className="collapse navbar-collapse" id="navbarSupportedContent">
      <ul className="navbar-nav me-auto mb-2 mb-lg-0">

        <li className="nav-item">
          <a className="nav-link" onClick={handleShow} href="#"> test modal</a>
        </li>
        <li className="nav-item dropdown">
          <a className="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-bs-toggle="dropdown" aria-expanded="false">
            Dropdown
          </a>
          <ul className="dropdown-menu" aria-labelledby="navbarDropdown">
            <li><a className="dropdown-item" href="#">Action</a></li>
            <li><a className="dropdown-item" href="#">Another action</a></li>
            <li><hr className="dropdown-divider" /></li>
            <li><a className="dropdown-item" href="#">Something else here</a></li>
          </ul>
        </li>

      </ul>
      <form className="d-flex">
        <input className="form-control me-2" type="search" placeholder="Search" aria-label="Search" />
        <button className="btn btn-outline-success" type="submit">Search</button>
      </form>
    </div>
  </div>
</nav>



      <Modal show={show} onHide={handleClose}  keyboard="false">
        <Modal.Header closeButton>
          <Modal.Title>Modal heading</Modal.Title>
        </Modal.Header>
        <Modal.Body>Are You Sure You Want This!.</Modal.Body>
        <Modal.Footer>
          <Button variant="secondary" onClick={handleClose}>
            Close
          </Button>
          <Button variant="danger" onClick={ confirm_modal  }>
          Yes
          </Button>
        </Modal.Footer>
      </Modal>
 
        </>
    )
}

export default Nav

4- now create any page (for example index.js) and test it .

how to test :

1- if you see bootstrap styles showing on navbar (colors , Buttons styles ) that's means the 'boostrap css is working fine'.

2- if the dropdown menue is clickable and working , that's means bootstrap js file is working fine .

3- if the test modal works and you see the confirmation box , that's means the react-bootstrap components works fine .

this is just example and change it based on your case/requirements .

i hope this helpful for you .

I presume we can add an update here.

It's always ok to use react-bootstrap inside a NextJS application, even with the last NextJs 13.4.x update, which added the new app directory.

But now, in order to keep the app running, every single component you are using in your application, if you decide to move to this latest update, and use the app directory, you have to use the directive "use client" at the top of your component if your are importing and using react-bootstrap component

react component example:

import { Container } from 'react-bootstrap';

const myReactComponentWithRB: React.FC<{}> = ({}) => {
   return (
       <Container>
         <h1>This is a test</h1>
       </Container>
   );
});

export default myReactComponentWithRB;

Normaly, there is no problem with this code. But if your are importing this component with the new app dir, you will need to add, "use client" at the top of your file, OR, you can add it at the top of the file which include this component. But if you do that, the component will not be rendered by your Next server, but by the browser.

Yup, you can use it, by providing CDN link inside your <head> tag in pages/index.js.

import Head from 'next/head';
import Badge from 'react-bootstrap/Badge';
import "../public/css/bootstrap.css";
const Index = () => (
    <Head>
      <link
        rel="stylesheet"
        href="https://maxcdn.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css"
        integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T"
        crossorigin="anonymous"
      />
    </Head>
    <div>
        <p className='display-4'>Hello</p>
        <Badge>Heading</Badge>
    </div>
)

export default Index;

Hope it works!!!

For Next JS 14 App Directory. First, install react-bootstrap

npm install react-bootstrap bootstrap

Then go to layout.jsx or layout.tsx file and import bootstrap CSS

import 'bootstrap/dist/css/bootstrap.min.css'

Here is the layout.tsx full code

import './globals.css'
import { Inter } from 'next/font/google'
import 'bootstrap/dist/css/bootstrap.min.css'

const inter = Inter({ subsets: ['latin'] })

export const metadata = {
  title: 'CodingMSTR',
  description: 'CodingMSTR',
}

export default function RootLayout({
  children,
}: {
  children: React.ReactNode
}) {
  return (
    <html lang="en">
      <body className={inter.className}>{children}</body>
    </html>
  )
}