<!-- top navigation header START --> 

<nav class="navbar navbar-expand-md bg-dark navbar-dark">

<!-- unused: fixed-top--> 
   
  
  <!-- Brand -->
  <a class="navbar-brand" href="/Default.aspx">
    <img id="logo" alt="Logo" src="https://picsum.photos/id/774/50/50">
    <span>Bootstrap 4 (layout w/content)</span>
  </a>

  <!-- Toggler/collapsible Button -->
  <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#collapsibleNavbar">
    <span class="navbar-toggler-icon"></span>
  </button>

  <!-- Navbar links -->
  <div class="collapse navbar-collapse justify-content-end" id="collapsibleNavbar">
    <ul class="navbar-nav">
      <li class="nav-item"> <a class="nav-link" href="#">Home</a> </li>
      <!-- Dropdown -->
      <li class="nav-item dropdown">
        <a class="nav-link dropdown-toggle" href="#" id="navbardrop" data-toggle="dropdown">
          About Us
        </a>
        <div class="dropdown-menu dropdown-menu-right">
          <a class="dropdown-item" href="#">Meetings meetings meetings</a>
          <a class="dropdown-item" href="#">Subscriptions</a>
          <a class="dropdown-item" href="#">History</a>
        </div>
      </li>
      <li class="nav-item"> <a class="nav-link" href="#blahblah">Click-to-scroll</a> </li>
    </ul>
  </div>
</nav>
<!-- top navigation header END -->



<!-- START of container section -->  
<div class="container">

<!-- START of content sections --> 
<!-- ========================= -->
 
  
<!-- Jumbotron content section-->  
    <div class="row">
    <div class="col text-center">
      column JUMBOTRON section
    </div>
  </div>
  
<!-- main page content and sidebar box -->
  <div class="row">
    <!-- sidebar navigation section -->
    <!-- auto-hides when small screen -->
    <div class="col sidebar_nav d-none d-md-block text-center">
      column SIDEBAR-NAV (hide this section on medium and smaller screens)
      
      <div class="col sidenavbar">
        <a href="https://getbootstrap.com/docs/3.4/getting-started/">BS3 docs style sidebar-nav</a> (should always stick to top regardless of scrolling down page)
      </div>
      
    </div>
  <!-- main content section -->  
    <div class="col text-center">

<h2>Column MAIN CONTENT</h2>


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    </div>
  </div>
  
  
  <!-- Carousel content section -->  
    <div class="row">
    <div class="col text-center">
      column CAROUSEL section
    </div>
  </div>

  <!-- cards content section -->
  <div class="row">
    <div class="col text-center">
      column CARD 1 OF 3 section
    </div>
    <div class="col text-center text-center">
      column CARD 2 OF 3 section
    </div>
    <div class="col text-center">
      column CARD 3 OF 3 section
    </div>
  </div>

  
  <!-- END of content sections -->  
</div>
  <!-- END of container section -->  



<!-- footer section -->  
<div class="footer_section text-center text-white bg-dark">
  <p>FOOTER section</p>
/* smooth scrolling with JS code */
html {
  scroll-behavior: smooth;
}


/* styling of content boxes */
.col {
  background-color: #FEF0B2;
  border-radius: 0.3rem;
  margin: 0.1rem;
  padding: 1rem;
}

/* styling of sidebar-navigation section */
.sidebar_nav {
  background-color: #F84F7F;
  border-radius: 0.3rem;
  margin: 0.1rem;
  padding: 1rem;
}

/* styling of footer section */
.footer_section {
  border-radius: 0.3rem;
  margin: 0.1rem;
  padding: 0.5rem;
}

/* sidebar navigation stays on top while scrolling */
.sidenavbar{
  position:-webkit-;
  position:sticky;
  top:0;
}
$(document).ready(function(){
  // Add smooth scrolling to all links
  $("a").on('click', function(event) {

    // Make sure this.hash has a value before overriding default behavior
    if (this.hash !== "") {
      // Prevent default anchor click behavior
      event.preventDefault();

      // Store hash
      var hash = this.hash;

      // Using jQuery's animate() method to add smooth page scroll
      // The optional number (800) specifies the number of milliseconds it takes to scroll to the specified area
      $('html, body').animate({
        scrollTop: $(hash).offset().top
      }, 800, function(){

        // Add hash (#) to URL when done scrolling (default click behavior)
        window.location.hash = hash;
      });
    } // End if
  });
});
Run Pen

External CSS

  1. https://cdn.jsdelivr.net/npm/bootstrap@4.6.0/dist/css/bootstrap.min.css

External JavaScript

  1. https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js
  2. https://cdn.jsdelivr.net/npm/bootstrap@4.6.0/dist/js/bootstrap.min.js