<body data-bs-spy="scroll" data-bs-target=".navbar" data-bs-offset="50">
  <nav class="navbar navbar-expand-sm bg-dark navbar-dark fixed-top">
    <div class="container-fluid">
      <ul class="navbar-nav">
        <li class="nav-item">
          <a class="nav-link" href="#section1">Section 1</a>
        </li>
        <li class="nav-item">
          <a class="nav-link" href="#section2">Section 2</a>
        </li>
        <li class="nav-item">
          <a class="nav-link" href="#section3">Section 3</a>
        </li>
      </ul>
    </div>
  </nav>
  
  <div id="section1" class="container-fluid text-bg-primary" style="padding:100px 20px;">
    <h1>Section 1</h1>
    <p>Try to scroll this section and look how the section is navigate while scrolling! Try to scroll this section and look how the section is navigate while scrolling!</p>
    <p>Try to scroll this section and look how the section is navigate while scrolling! Try to scroll this section and look how the section is navigate while scrolling!</p>
  </div>
  
  <div id="section2" class="container-fluid text-bg-secondary" style="padding:100px 20px;height:200px">
    <h1>Section 2</h1>
    <p>Try to scroll this section and look how the section is navigate while scrolling! Try to scroll this section and look how the section is navigate while scrolling!</p>
    <p>Try to scroll this section and look how the section is navigate while scrolling! Try to scroll this section and look how the section is navigate while scrolling!</p>
  </div>
  
  <div id="section3" class="container-fluid text-bg-info" style="padding:100px 20px;">
    <h1>Section 3</h1>
    <p>Try to scroll this section and look how the section is navigate while scrolling! Try to scroll this section and look how the section is navigate while scrolling!</p>
    <p>Try to scroll this section and look how the section is navigate while scrolling! Try to scroll this section and look how the section is navigate while scrolling!</p>
  </div>
</body>