
The rapid growth of single-page applications has led to an inevitable rise of JavaScript frameworks (the most widely used of which is React). As a result, this has led to the emergence of CSS frameworks to aid software developers in creating web applications. As React is the most popular framework for building applications, Bootstrap is a widely used CSS framework utilized by millions of developers around the globe.

## 
### How does React-Bootstrap work 

Rather than using JavaScript sources and plugins from the CDN, React-bootstrap converts JavaScript to React components and merges them. Moreover, Bootstrap is compatible with all themes to give a consistent UI for our application. React-Bootstrap is one of the oldest React libraries, making it a suitable choice as our UI foundation. Let's discuss how to integrate a React-Bootstrap navigation bar in a React application.

##  
### Installation

The easiest way to install React-Bootstrap is via the `npm` package, as shown in the command below:

```sh
$ npm install react-bootstrap bootstrap
```

## 
### Code

We will grab a [navbar](https://react-bootstrap.netlify.app/docs/components/navbar/) component from React-Bootstrap and add it to `App.js`:

import React from 'react';
import ReactDOM from 'react-dom';
import App from './App';


ReactDOM.render(
  <React.StrictMode>
    <App />
  </React.StrictMode>,
  document.getElementById('root')
);

import React from 'react'
import Nav from 'react-bootstrap/Nav' 
import Navbar from 'react-bootstrap/Navbar'
import "bootstrap/dist/css/bootstrap.min.css"
 function App(){
  return (
    <div >
      <Navbar bg="dark">
        <Navbar.Brand href="#home" style={{color:"white"}}>React-Bootstrap</Navbar.Brand> 
          <Nav className>
          <Nav.Link href="#link1" style={{color:"white"}}>Primary Link</Nav.Link> 
          <Nav.Link href="#link2" style={{color:"white"}}>Secondary Link</Nav.Link>
          </Nav> 
        </Navbar>
    </div>
    ); 
  }
export default App;




  

import React from 'react';
import { shallow, configure } from 'enzyme';
import Adapter from 'enzyme-adapter-react-16';

configure({ adapter: new Adapter() });

import HelloWorld from './app';

var TestResult = function() {
    this.succeeded = false;
    this.reason = "";
    this.input = "";
    this.expected_output = "";
    this.actual_output = "";
}

export const executeTests = function() {

  var results = [];

  result = new TestResult();
  result.input = 'HelloWorld Component';
  result.expected_output = "span containing text 'Hello World'"

  let wrapper = shallow(<HelloWorld />);

  // Call your Challenge function here.

  let type = wrapper.type();
  let testSuccessful = true;
  let failureReason;

  if (type !== 'span') {
    testSuccessful = false;
    failureReason = "You need to render exactly one span HTML element";
  } else if (wrapper.props().children != "Hello World") {
     testSuccessful = false;
     failureReason = "You have rendered wrong message in your span element";
  }

  result.actual_output = wrapper.html();

  if (testSuccessful) {
    result.succeeded = true;
    result.reason = "Succeeded"
  } else {
    result.succeeded = false;
    result.reason = failureReason;
  }

  results.push(result);

  return results;
}


check

React

Dart

GoJS React

Typescript React

Vue.js

> **Note:** React-Bootstrap has different components that we can use. To use a component, go to the Bootstrap #key# documentation:https://react-bootstrap.github.io/ #key#, copy the component’s markup, and update it according to the requirements.

## 
### Explanation

* **Lines 1–4**: These lines import the `react-bootstrap` dependencies required to set up the navigation bar.

* **Line 8:** This line sets the background color of the navigation bar.  

* **Line 9**: `Nav.Brand` adds the title **React-Bootstrap** to the navigation bar and links it to the home page.

* **Lines 10–13**: These lines add the two links, "Primary Link" and "Secondary Link", to the navigation bar. We can modify this template bar to add/remove features to suit our applications.








MERN.tar.gz

How to create a navigation bar using React-Bootstrap

Integrate React-Bootstrap for creating consistent UI in React apps, using npm for installation, and customizing components from documentation.