Not loading Bootstrap Navbar - React

Updated, now the problem i'm seeing the navbar with format problems, shouldn't it be taking the CSS properties from bootstrap?

I Commited the project to make it easier: https://github.com/damianaguilarcogan/pfi_front_v4

Image: https://ibb.co/fdFTb4C

i just created a project but the navbar it's not loading, for sure it's a silly mistake but i'm not beeing able to find it.

I created the project, imported bootstrap in the index.html trought css links. I created the folder components and inside ir navbar.js. Afterwards I selected a common template from bootstrap navbar and Finally y called it from my app.js. I don't get to see whats wrong, it should have already worked with this steps.

app.js

    import React from 'react';
    import logo from './logo.svg';
    import './App.css';
    import navbar from './components/navbar';
    
    function App() {
      return (
        <div className="App">
          <navbar />
          <header className="App-header">
            <img src={logo} className="App-logo" alt="logo" />
            <p>
              Edit <code>src/App.js</code> and save to reload.
            </p>
    
            <a
              className="App-link"
              href="https://reactjs.org"
              target="_blank"
              rel="noopener noreferrer"
            >
              Learn React
            </a>
          </header>
        </div>
      );
    }
    
    export default App;

navbar.js

import React from 'react';

class navbar extends React.Component {
    render() {
        return (
            <nav className="navbar navbar-toggleable-md navbar-light bg-faded">
                <button className="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse"
                        data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent"
                        aria-expanded="false" aria-label="Toggle navigation">
                    <span className="navbar-toggler-icon"></span>
                </button>
                <a className="navbar-brand" href="#">Navbar</a>

                <div className="collapse navbar-collapse" id="navbarSupportedContent">
                    <ul className="navbar-nav mr-auto">
                        <li className="nav-item active">
                            <a className="nav-link" href="#">Home <span className="sr-only">(current)</span></a>
                        </li>
                        <li className="nav-item">
                            <a className="nav-link" href="#">Link</a>
                        </li>
                        <li className="nav-item">
                            <a className="nav-link disabled" href="#">Disabled</a>
                        </li>
                    </ul>
                    <form className="form-inline my-2 my-lg-0">
                        <input className="form-control mr-sm-2" type="text" placeholder="Search"></input>
                            <button className="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
                    </form>
                </div>
            </nav>
        )
    }
}
export default navbar;


  [1]: https://i.sstatic.net/zk8Lf.png

Solution

React expects components to be named with an uppercase. Try renaming the navbar to Navbar.

class Navbar extends React.Component

<Navbar/>