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 How to use bootstrap in React JS?

Bootstrap is an external library that contains a .css file and .js file to provide a responsive web layout. responsive means, Layout which is compatible with Mobile Screen, Desktop Screen, TV Screen, Tablet Screen, Projector, etc.

Bootstrap contain set of CSS block which will be called under HTML element. for example, if we want to create two different partitions which is compatible with all device.

We can use bootstrap in react-js using three different ways:-


1)  using CDN on index.html

2)  Download the bootstrap plugin and put it into the public folder

3)  install bootstrap using npm


1)  using CDN on index.html:-

copy the complete link of bootstrap on index.html file of the public directory

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8" />
    <link rel="icon" href="%PUBLIC_URL%/favicon.ico" />
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <meta name="theme-color" content="#000000" />
    <meta
      name="description"
      content="Web site created using create-react-app"
    />
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap-theme.min.css" integrity="sha384-rHyoN1iRsVXV4nD0JutlnGaslCJuC7uwjduW9SVrLvRYooPp2bWYgmgJQIXwl/Sp" crossorigin="anonymous">
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>
    
    <!--
      manifest.json provides metadata used when your web app is installed on a
      user's mobile device or desktop. See https://developers.google.com/web/fundamentals/web-app-manifest/
    -->
    
    <!--
      Notice the use of %PUBLIC_URL% in the tags above.
      It will be replaced with the URL of the `public` folder during the build.
      Only files inside the `public` folder can be referenced from the HTML.

      Unlike "/favicon.ico" or "favicon.ico", "%PUBLIC_URL%/favicon.ico" will
      work correctly both with client-side routing and a non-root public URL.
      Learn how to configure a non-root public URL by running `npm run build`.
    -->
    <title>React App</title>
  </head>
  <body>
    <noscript>You need to enable JavaScript to run this app.</noscript>
    <div id="root"></div>
    <!--
      This HTML file is a template.
      If you open it directly in the browser, you will see an empty page.

      You can add webfonts, meta tags, or analytics to this file.
      The build step will place the bundled scripts into the <body> tag.

      To begin the development, run `npm start` or `yarn start`.
      To create a production bundle, use `npm run build` or `yarn build`.
    -->
    <script src="%PUBLIC_URL%/assets/js/jquery-2.1.0.min.js"></script>

    <!-- Bootstrap -->
    <script src="%PUBLIC_URL%/assets/js/popper.js"></script>
    <script src="%PUBLIC_URL%/assets/js/bootstrap.min.js"></script>

    <!-- Plugins -->
    <script src="%PUBLIC_URL%/assets/js/owl-carousel.js"></script>
    <script src="%PUBLIC_URL%/assets/js/scrollreveal.min.js"></script>
    <script src="%PUBLIC_URL%/assets/js/waypoints.min.js"></script>
    <script src="%PUBLIC_URL%/assets/js/jquery.counterup.min.js"></script>
    <script src="%PUBLIC_URL%/assets/js/imgfix.min.js"></script>

    <!-- Global Init -->
    <script src="%PUBLIC_URL%/assets/js/custom.js"></script>
  </body>
</html>


2) Write the code on the app.js file to integrate bootstrap class file


import React,{ lazySuspense }  from 'react'
//import NameList from './NameList'
const NameList = React.lazy(() => import('./NameList'));  
  
class App extends React.Component {  
  render() {  
    return (  
      <div>  
         <div class="jumbotron text-center">
            <h1 class="text-primary">Welcome in BootStrap</h1>
         </div>

         <div class="container">
           <div class="row">
             <div class="col-sm-4">
             <h3>Column1</h3>
            <p>JAVA</p>
              <p>dfhgad fhgdhfgsdjhfgsdjhg fjsd gf djhfg dfdg fgdjh fgdjh fgjhad gfhdgfh gdfhgdjhgfdjhgfhadgjhfg djhfg djh fgdh gfhdgfhgdjh fgjhadfgadjh fgd gfhd gfdgjhfg adjh fgjhd gfdh gfhdgfh gdhf gadjh fgjhad gfhadgfhgadjhfg adjhfg adhg fhadg fhad gfhgadjhf gajhfgjha gfasgfh gdjhfgadjh fgasjhgfjhas gas gfjgas jh fgasjh gfasg hadg jhfgd hf gdjh fghd gfhd ghf gdjh fg</p>
             </div>
             <div class="col-sm-4">
             <h3>Column1</h3>
            <p>JAVA</p>
              <p>dfhgad fhgdhfgsdjhfgsdjhg fjsd gf djhfg dfdg fgdjh fgdjh fgjhad gfhdgfh gdfhgdjhgfdjhgfhadgjhfg djhfg djh fgdh gfhdgfhgdjh fgjhadfgadjh fgd gfhd gfdgjhfg adjh fgjhd gfdh gfhdgfh gdhf gadjh fgjhad gfhadgfhgadjhfg adjhfg adhg fhadg fhad gfhgadjhf gajhfgjha gfasgfh gdjhfgadjh fgasjhgfjhas gas gfjgas jh fgasjh gfasg hadg jhfgd hf gdjh fghd gfhd ghf gdjh fg</p>
               </div>
               <div class="col-sm-4">
               <h3>Column1</h3>
            <p>JAVA</p>
              <p>dfhgad fhgdhfgsdjhfgsdjhg fjsd gf djhfg dfdg fgdjh fgdjh fgjhad gfhdgfh gdfhgdjhgfdjhgfhadgjhfg djhfg djh fgdh gfhdgfhgdjh fgjhadfgadjh fgd gfhd gfdgjhfg adjh fgjhd gfdh gfhdgfh gdhf gadjh fgjhad gfhadgfhgadjhfg adjhfg adhg fhadg fhad gfhgadjhf gajhfgjha gfasgfh gdjhfgadjh fgasjhgfjhas gas gfjgas jh fgasjh gfasg hadg jhfgd hf gdjh fghd gfhd ghf gdjh fg</p>
               </div>
           </div>
         </div>

         <div class="jumbotron text-center">
            <p>Welcome in Footer Content</p>
         </div>
      </div>  
    )  
  }  

export default App;

2)  Download the bootstrap plugin and put it into the public folder:-

   download bootstrap library and put it into the public folder.

   create assets subfolder ad create two subfolder CSS and js then write following code.

  Write the following code on the index.html file:-


<link href="/assets/css/bootstrap.min.css" type="text/css" rel="stylesheet" />
<link src="/assets/js/bootstrap.min.js" type="text/JavaScript" />




3)  install bootstrap using npm:-

this is REACT JS command-based approach.


open a terminal and write two command

npm install --save bootstrap

npm install popper.js --save


now open index.js file and write the following code:-

import 'bootstrap/dist/css/bootstrap.css';
  import Popper from 'popper.js';
  import 'bootstrap/dist/js/bootstrap.bundle.min';





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