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HTML

              
                   <nav class="navbar navbar-expand-md fixed-top navbar-dark">
      <a class="navbar-brand" href="#">Fixed navbar</a>
      <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarCollapse" aria-controls="navbarCollapse" aria-expanded="false" aria-label="Toggle navigation">
        <span class="navbar-toggler-icon"></span>
      </button>
      <div class="collapse navbar-collapse" id="navbarCollapse">
        <ul class="navbar-nav mr-auto">
          <li class="nav-item active">
            <a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
          </li>
          <li class="nav-item">
            <a class="nav-link" href="#">Link</a>
          </li>
          <li class="nav-item">
            <a class="nav-link disabled" href="#">Disabled</a>
          </li>
        </ul>
        <form class="form-inline mt-2 mt-md-0">
          <input class="form-control mr-sm-2" type="text" placeholder="Search" aria-label="Search">
          <button class="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
        </form>
      </div>
    </nav>


      <!--
    ####################################################
    C A R O U S E L
    ####################################################
    -->
    <div id="carousel" class="carousel slide carousel-fade" data-ride="carousel" data-interval="6000">
        <ol class="carousel-indicators">
            <li data-target="#carousel" data-slide-to="0" class="active"></li>
            <li data-target="#carousel" data-slide-to="1"></li>
            <li data-target="#carousel" data-slide-to="2"></li>
        </ol>
        <div class="carousel-inner" role="listbox">
            <div class="carousel-item active">
                <a href="https://bootstrapcreative.com/">
                    <!-- 
                    If you need more browser support use https://scottjehl.github.io/picturefill/
                    If a picture looks blurry on a retina device you can add a high resolution like this
                    <source srcset="img/blog-post-1000x600-2.jpg, [email protected] 2x" media="(min-width: 768px)">

                    What image sizes should you use? This can help - https://codepen.io/JacobLett/pen/NjramL
                     -->
                     <picture>
                      <source srcset="https://dummyimage.com/2000x500/007aeb/4196e5" media="(min-width: 1400px)">
                      <source srcset="https://dummyimage.com/1400x500/#007aeb/4196e5" media="(min-width: 769px)">
                       <source srcset="https://dummyimage.com/800x500/007aeb/4196e5" media="(min-width: 577px)">
                      <img srcset="https://dummyimage.com/600x500/007aeb/4196e5" alt="responsive image" class="d-block img-fluid">
                    </picture>

                    <div class="carousel-caption">
                        <div>
                            <h2>Digital Craftsmanship</h2>
                            <p>We meticously build each site to get results</p>
                            <span class="btn btn-sm btn-outline-secondary">Learn More</span>
                        </div>
                    </div>
                </a>
            </div>
            <!-- /.carousel-item -->
            <div class="carousel-item">
                <a href="https://bootstrapcreative.com/">
                     <picture>
                      <source srcset="https://dummyimage.com/2000x500/007aeb/4196e5" media="(min-width: 1400px)">
                      <source srcset="https://dummyimage.com/1400x500/007aeb/4196e5" media="(min-width: 769px)">
                       <source srcset="https://dummyimage.com/800x500/007aeb/4196e5" media="(min-width: 577px)">
                      <img srcset="https://dummyimage.com/600x500/007aeb/4196e5" alt="responsive image" class="d-block img-fluid">
                    </picture>

                    <div class="carousel-caption justify-content-center align-items-center">
                        <div>
                            <h2>Every project begins with a sketch</h2>
                            <p>We work as an extension of your business to explore solutions</p>
                            <span class="btn btn-sm btn-outline-secondary">Our Process</span>
                        </div>
                    </div>
                </a>
            </div>
            <!-- /.carousel-item -->
            <div class="carousel-item">
                <a href="https://bootstrapcreative.com/">
                     <picture>
                      <source srcset="https://dummyimage.com/2000x500/007aeb/4196e5" media="(min-width: 1400px)">
                      <source srcset="https://dummyimage.com/1400x500/007aeb/4196e5" media="(min-width: 769px)">
                       <source srcset="https://dummyimage.com/800x500/007aeb/4196e5" media="(min-width: 577px)">
                      <img srcset="https://dummyimage.com/600x500/007aeb/4196e5" alt="responsive image" class="d-block img-fluid">
                    </picture>

                    <div class="carousel-caption justify-content-center align-items-center">
                        <div>
                            <h2>Performance Optimization</h2>
                            <p>We monitor and optimize your site's long-term performance</p>
                            <span class="btn btn-sm btn-secondary">Learn How</span>
                        </div>
                    </div>
                </a>
            </div>
            <!-- /.carousel-item -->
        </div>
        <!-- /.carousel-inner -->
        <a class="carousel-control-prev" href="#carousel" role="button" data-slide="prev">
            <span class="carousel-control-prev-icon" aria-hidden="true"></span>
            <span class="sr-only">Previous</span>
        </a>
        <a class="carousel-control-next" href="#carousel" role="button" data-slide="next">
            <span class="carousel-control-next-icon" aria-hidden="true"></span>
            <span class="sr-only">Next</span>
        </a>
    </div>
    <!-- /.carousel -->


<div class="container py-5">
  <h2>Some filler text to make the page vertically scroll</h2>
<p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Atque veniam laudantium hic vitae tenetur! Amet, saepe? Ipsam, illum expedita iusto sint aspernatur dicta nam aliquam consequatur corporis praesentium, necessitatibus quibusdam.</p>
  <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Atque veniam laudantium hic vitae tenetur! Amet, saepe? Ipsam, illum expedita iusto sint aspernatur dicta nam aliquam consequatur corporis praesentium, necessitatibus quibusdam.</p>
  <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Atque veniam laudantium hic vitae tenetur! Amet, saepe? Ipsam, illum expedita iusto sint aspernatur dicta nam aliquam consequatur corporis praesentium, necessitatibus quibusdam.</p>
  <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Atque veniam laudantium hic vitae tenetur! Amet, saepe? Ipsam, illum expedita iusto sint aspernatur dicta nam aliquam consequatur corporis praesentium, necessitatibus quibusdam.</p>
  <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Atque veniam laudantium hic vitae tenetur! Amet, saepe? Ipsam, illum expedita iusto sint aspernatur dicta nam aliquam consequatur corporis praesentium, necessitatibus quibusdam.</p>
  <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Atque veniam laudantium hic vitae tenetur! Amet, saepe? Ipsam, illum expedita iusto sint aspernatur dicta nam aliquam consequatur corporis praesentium, necessitatibus quibusdam.</p>
  <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Atque veniam laudantium hic vitae tenetur! Amet, saepe? Ipsam, illum expedita iusto sint aspernatur dicta nam aliquam consequatur corporis praesentium, necessitatibus quibusdam.</p>
  <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Atque veniam laudantium hic vitae tenetur! Amet, saepe? Ipsam, illum expedita iusto sint aspernatur dicta nam aliquam consequatur corporis praesentium, necessitatibus quibusdam.</p>
  <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Atque veniam laudantium hic vitae tenetur! Amet, saepe? Ipsam, illum expedita iusto sint aspernatur dicta nam aliquam consequatur corporis praesentium, necessitatibus quibusdam.</p>
  <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Atque veniam laudantium hic vitae tenetur! Amet, saepe? Ipsam, illum expedita iusto sint aspernatur dicta nam aliquam consequatur corporis praesentium, necessitatibus quibusdam.</p>
  <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Atque veniam laudantium hic vitae tenetur! Amet, saepe? Ipsam, illum expedita iusto sint aspernatur dicta nam aliquam consequatur corporis praesentium, necessitatibus quibusdam.</p>
  <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Atque veniam laudantium hic vitae tenetur! Amet, saepe? Ipsam, illum expedita iusto sint aspernatur dicta nam aliquam consequatur corporis praesentium, necessitatibus quibusdam.</p>
  <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Atque veniam laudantium hic vitae tenetur! Amet, saepe? Ipsam, illum expedita iusto sint aspernatur dicta nam aliquam consequatur corporis praesentium, necessitatibus quibusdam.</p>
  <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Atque veniam laudantium hic vitae tenetur! Amet, saepe? Ipsam, illum expedita iusto sint aspernatur dicta nam aliquam consequatur corporis praesentium, necessitatibus quibusdam.</p>
  <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Atque veniam laudantium hic vitae tenetur! Amet, saepe? Ipsam, illum expedita iusto sint aspernatur dicta nam aliquam consequatur corporis praesentium, necessitatibus quibusdam.</p>
  <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Atque veniam laudantium hic vitae tenetur! Amet, saepe? Ipsam, illum expedita iusto sint aspernatur dicta nam aliquam consequatur corporis praesentium, necessitatibus quibusdam.</p>
  <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Atque veniam laudantium hic vitae tenetur! Amet, saepe? Ipsam, illum expedita iusto sint aspernatur dicta nam aliquam consequatur corporis praesentium, necessitatibus quibusdam.</p>
  <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Atque veniam laudantium hic vitae tenetur! Amet, saepe? Ipsam, illum expedita iusto sint aspernatur dicta nam aliquam consequatur corporis praesentium, necessitatibus quibusdam.</p>
  <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Atque veniam laudantium hic vitae tenetur! Amet, saepe? Ipsam, illum expedita iusto sint aspernatur dicta nam aliquam consequatur corporis praesentium, necessitatibus quibusdam.</p>
  <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Atque veniam laudantium hic vitae tenetur! Amet, saepe? Ipsam, illum expedita iusto sint aspernatur dicta nam aliquam consequatur corporis praesentium, necessitatibus quibusdam.</p>
</div>
<!-- /.container -->








  

              
            
!

CSS

              
                body {background:#e2e2e2;}

              
            
!

JS

              
                $(document).ready(function() {
  // executes when HTML-Document is loaded and DOM is ready


  /*
  ################
  Add navbar background color when scrolled
  */
  $(window).scroll(function() {
    if ($(window).scrollTop() > 56) {
      $(".navbar").addClass("bg-dark");
    } else {
      $(".navbar").removeClass("bg-dark");
    }
  });
  // If Mobile, add background color when toggler is clicked
  $(".navbar-toggler").click(function() {
    if (!$(".navbar-collapse").hasClass("show")) {
      $(".navbar").addClass("bg-dark");
    } else {
      if ($(window).scrollTop() < 56) {
        $(".navbar").removeClass("bg-dark");
      } else {
      }
    }
  });
  // ############

  // document ready
});
              
            
!
999px

Console