Q:

How to import js file from src file into index.html?

I am creating one system using React and I am still new to React. I need to add js file in my index.html where that js file is located in the src folder. I need to import this js file in order to make my system works. Does anyone know how to solve my problem? Thanks in advance.
This is how I import my js file. I think there is something wrong with my path. Does anyone know the correct path to import my js file?
      //index.html    
      <!DOCTYPE html>
       <html lang="en">
        <head>
         <meta charset="utf-8" />
         <link rel="shortcut icon" href="%PUBLIC_URL%/favicon.ico" />
         <meta name="viewport" content="width=device-width, initial-scale=1" />
         <meta name="theme-color" content="#000000" />
         <link rel="manifest" href="%PUBLIC_URL%/manifest.json" />
         <title>React App</title>
         </head>
         <body>
           <noscript>You need to enable JavaScript to run this app.</noscript>
           <div id="root"></div>
           <script src="http://code.jquery.com/jquery-3.3.1.min.js" integrity="sha256-FgpCb/KJQlLNfOu91ta32o/NMZxltwRo8QtmkMRdAu8=" crossorigin="anonymous"></script>
           <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
           <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js" integrity="sha384-uefMccjFJAIv6A+rW+L4AHf99KvxDjWSu1z9VI8SKNVmz4sk7buKt/6v9KI65qnm" crossorigin="anonymous"></script>
           <script src="https://unpkg.com/@coreui/coreui/dist/js/coreui.min.js"></script>
           <script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.5.0/Chart.min.js" crossorigin></script>
           <script type="text/javascript" src='../src/js/index.js'></script>
         </body>
        </html>

As you can see from the picture above, my index.js is located under the src folder.

A:

As i think this is not good way to do this. your trying to add your ./src some js file to ./public folder index.html
this is not recommended way. but if you want add some external links, put it under ./public folder and import it but this not recommended way.
ref :  sample project for external import

