JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <!-- Bootstrap CSS -->
    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css" integrity="sha384-9aIt2nRpC12Uk9gS9baDl411NQApFmC26EwAOH8WgZl5MYYxFfc+NcPb1dKGj7Sk" crossorigin="anonymous">
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css">
    <!--Custom CSS-->
    <!-- <link rel="stylesheet" href="style.css"> -->
</head>
<body>
     <!--navbar-->
    <nav class="navbar sticky-top navbar-expand-lg navbar-light bg-light">
        <a class="navbar-brand">Jill Peskin Counselling</a>
        <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarText" aria-controls="navbarText" aria-expanded="false" aria-label="Toggle navigation">
            <span class="navbar-toggler-icon"></span>
        </button>

        <div class="collapse navbar-collapse" id="navbarText">
            <ul class="navbar-nav mr-auto">
                <li class="nav-item">
                    <a class="nav-link" href="#jill">Home</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#training">Training and Experience</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#sessions">Sessions and Fees</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#contact">Contact Me</a>
                </li>
            </ul>
            <span class="navbar-text">
                Here for you when you need it most
            </span>
        </div>
    </nav>
    <!-- jQuery first, then Popper.js, then Bootstrap JS -->
    <script src="https://code.jquery.com/jquery-3.5.1.min.js"...