B6strap

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code:

<!doctype html>
<html lang="hu">
  <head>
    <!-- Required meta tags -->
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no" />

	<link  rel="stylesheet" href="$016-breadcumb.css" />
	
    <!-- Bootstrap CSS -->
    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" 
		  integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" 
		  crossorigin="anonymous" />

    <title>07-carousel</title>
	

CSS START

        body {
            margin: 0;
            padding : 0;
        }

        h1 {
            height: 5vh;
            line-height: 5vh;
            margin: 0;
            padding : 0;
            width: 100%;
            position: fixed;
            background-color: transzparent;
            z-index: 10;
        }

        .bg-attach-absolute {   // default setting
            background-attachment: absolute;
        } 

        .carousel-item {
            height: 100vh;
            background-repeat: no-repeat;
            background-position: center center;
            background-size: cover;
            background-color: whitesmoke;
            overflow: hidden;
        }

        .carousel-item>img {
            position: absolute;
            top: 5vh;
            left: 0;
            background-image: url('data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7');
            min-width: 100%;
            height: 90vh;
        }

CSS END

CONTENT START

    <link href="carousel-absolute.css" rel="stylesheet">

</head>
  <body>
    <h1>07-01-carousel simple - slides only</h1>	
      
<div id="carouselExampleSlidesOnly" class="carousel w-100 slide carousel-fade" data-ride="carousel">
    
  <div class="carousel-inner">
     <div class="carousel-item" style="background-image: url(../img192-bazilka.jpg)">
        <img src="data:image/gif;base64,R0lGODdhAQADAPABAP////8AACwAAAAAAQADAAACAgxQADs=" alt="." />
    </div>
     <div class="carousel-item" style="background-image: url(../img1920-gristmill.jpg)">
        <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAUEBAAAACwAAAAAAQABAAACAkQBADs=" alt="." />
    </div>
     <div class="carousel-item active" style="background-image: url(../img1920-rozsa.jpg)">
        <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" alt="." />
    </div>
     <div class="carousel-item" style="background-image: url(../img1920-sagrada.jpg)">
        <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAUEBAAAACwAAAAAAQABAAACAkQBADs=" alt="." />
    </div>
     <div class="carousel-item" style="background-image: url(../img1920-stadion.jpg)">
        <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" alt="." />
    </div>
  </div>
</div>
<hr />

CONTENT END



    <h3 class="text-center">EoF</h3>
<hr />

    <!-- Optional JavaScript -->
    <!-- jQuery first, then Popper.js, then Bootstrap JS -->
    <script src="https://code.jquery.com/jquery-3.4.1.slim.min.js" 
			integrity="sha384-J6qa4849blE2+poT4WnyKhv5vZF5SrPo0iEjwBvKU7imGFAV0wwj1yYfoRSJoZ+n" 
			crossorigin="anonymous"></script>
    <script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js" 
			integrity="sha384-Q6E9RHvbIyZFJoft+2mJbHaEWldlvI9IOYy5n3zV9zzTtmI3UksdQRVvoxMfooAo" 
			crossorigin="anonymous"></script>
    <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js" 
			integrity="sha384-wfSDF2E50Y2D1uUdj0O3uMBJnjuUD4Ih7YwaYd1iqfktj0Uod8GCExl3Og8ifwB6" 
			crossorigin="anonymous"></script>
  </body>
</html>