Bootstrap 4 - Carrossel
Descrição
Carrossel é uma maneira flexível e responsiva de adicionar um controle deslizante ao seu site. Para criar um carrossel,
Adicione os .carousel e .slide classes para o recipiente juntamente com um id.
Especifique os slides em um <div> com class .carousel-inner e cada slide definido com .carousel-item class.
Adicione a classe .active a um dos slides para tornar o carrossel visível; caso contrário, o carrossel não ficará visível.
Carrossel Básico
Uma apresentação de slides simples abaixo mostra carrossel básico com indicadores e controles -
Exemplo
<html lang = "en">
<head>
<!-- Meta tags -->
<meta charset = "utf-8">
<meta name = "viewport" content = "width = device-width, initial-scale = 1, shrink-to-fit = no">
<!-- Bootstrap CSS -->
<link rel = "stylesheet"
href = "https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css"
integrity = "sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO"
crossorigin = "anonymous">
<title>Bootstrap 4 Example</title>
</head>
<body>
<div class = "container">
<h2>Basic Carousel</h2>
<div id = "carouselwithIndicators" class = "carousel slide w-50" data-ride = "carousel">
<ol class = "carousel-indicators">
<li data-target = "#carouselExampleIndicators" data-slide-to = "0" class = "active"></li>
<li data-target = "#carouselExampleIndicators" data-slide-to = "1"></li>
<li data-target = "#carouselExampleIndicators" data-slide-to = "2s"></li>
</ol>
<div class =" carousel-inner">
<div class = "carousel-item active">
<img class = "d-block w-100"
src = "https://www.tutorialspoint.com/bootstrap/images/slide1.png"
alt = "First slide">
</div>
<div class = "carousel-item">
<img class = "d-block w-100"
src = "https://www.tutorialspoint.com/bootstrap/images/slide2.png"
alt = "Second slide">
</div>
<div class = "carousel-item">
<img class = "d-block w-100"
src = "https://www.tutorialspoint.com/bootstrap/images/slide3.png"
alt = "Third slide">
</div>
</div>
<a class = "carousel-control-prev" href = "#carouselwithIndicators" 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 = "#carouselwithIndicators" role = "button" data-slide = "next">
<span class = "carousel-control-next-icon" aria-hidden = "true"></span>
<span class = "sr-only">Next</span>
</a>
</div>
</div>
<!-- jQuery first, then Popper.js, then Bootstrap JS -->
<script src = "https://code.jquery.com/jquery-3.3.1.slim.min.js"
integrity = "sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo"
crossorigin = "anonymous">
</script>
<script src = "https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js"
integrity = "sha384-ZMP7rVo3mIykV+2+9J3UJ46jBk0WLaUAdn689aCwoqbBJiSnjAK/l8WvCWPIPm49"
crossorigin = "anonymous">
</script>
<script src = "https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js"
integrity = "sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy"
crossorigin = "anonymous">
</script>
</body>
</html>Isso produzirá o seguinte resultado -
Resultado
Note- No exemplo, usamos w-50 para o carrossel e w-100 para as imagens, o que fornece largura de 50% e uma margem esquerda e direita de auto e 100% de largura para as imagens do carrossel.
Legendas para slides
Adicione as legendas à apresentação de slides usando a classe .carousel-caption dentro da classe .carousel-item .
O exemplo a seguir demonstra como adicionar legendas à apresentação de slides -
Exemplo
<html lang = "en">
<head>
<!-- Meta tags -->
<meta charset = "utf-8">
<meta name = "viewport" content = "width = device-width, initial-scale = 1, shrink-to-fit = no">
<!-- Bootstrap CSS -->
<link rel = "stylesheet"
href = "https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css"
integrity = "sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO"
crossorigin = "anonymous">
<title>Bootstrap 4 Example</title>
</head>
<body>
<div class = "container">
<h2>Carousel with Caption</h2>
<div id = "carouselwithIndicators" class = "carousel slide w-50" data-ride = "carousel">
<ol class = "carousel-indicators">
<li data-target = "#carouselExampleIndicators" data-slide-to = "0" class = "active"></li>
<li data-target = "#carouselExampleIndicators" data-slide-to = "1"></li>
<li data-target = "#carouselExampleIndicators" data-slide-to = "2"></li>
</ol>
<div class = "carousel-inner">
<div class = "carousel-item active">
<img class = "d-block w-100"
src = "https://www.tutorialspoint.com/bootstrap/images/slide1.png"
alt = "First slide">
<div class = "carousel-caption d-none d-md-block">
<h5>HTML</h5>
<p>Hypertext Markup Language</p>
</div>
</div>
<div class = "carousel-item">
<img class = "d-block w-100"
src = "https://www.tutorialspoint.com/bootstrap/images/slide2.png"
alt = "Second slide">
<div class = "carousel-caption d-none d-md-block">
<h5>CSS</h5>
<p>Cascading Style Sheets</p>
</div>
</div>
<div class = "carousel-item">
<img class = "d-block w-100"
src = "https://www.tutorialspoint.com/bootstrap/images/slide3.png"
alt = "Third slide">
<div class = "carousel-caption d-none d-md-block">
<h5>PHP</h5>
<p>Hypertext Preprocessor</p>
</div>
</div>
</div>
<a class = "carousel-control-prev" href = "#carouselwithIndicators" 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 = "#carouselwithIndicators" role =" button" data-slide = "next">
<span class = "carousel-control-next-icon" aria-hidden = "true"></span>
<span class = "sr-only">Next</span>
</a>
</div>
</div>
<!-- jQuery first, then Popper.js, then Bootstrap JS -->
<script src = "https://code.jquery.com/jquery-3.3.1.slim.min.js"
integrity = "sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo"
crossorigin = "anonymous">
</script>
<script src = "https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js"
integrity = "sha384-ZMP7rVo3mIykV+2+9J3UJ46jBk0WLaUAdn689aCwoqbBJiSnjAK/l8WvCWPIPm49"
crossorigin = "anonymous">
</script>
<script src = "https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js"
integrity = "sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy"
crossorigin = "anonymous">
</script>
</body>
</html>Isso produzirá o seguinte resultado -
Resultado
Crossfade
Você pode adicionar efeito de transição de esmaecimento para animar os slides do carrossel usando a classe .carousel-fade, conforme mostrado no exemplo abaixo -
Exemplo
<html lang = "en">
<head>
<!-- Meta tags -->
<meta charset = "utf-8">
<meta name = "viewport" content = "width = device-width, initial-scale = 1, shrink-to-fit = no">
<!-- Bootstrap CSS -->
<link rel = "stylesheet"
href = "https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css"
integrity = "sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO"
crossorigin = "anonymous">
<title>Bootstrap 4 Example</title>
</head>
<body>
<div class = "container">
<h2>Carousel with Crossfade</h2>
<div id = "carouselExampleFade" class = "carousel carousel-fade w-50" data-ride = "carousel">
<div class = "carousel-inner">
<div class = "carousel-item active">
<img class = "d-block w-100"
src = "https://www.tutorialspoint.com/bootstrap/images/slide1.png"
alt = "First slide">
</div>
<div class = "carousel-item">
<img class = "d-block w-100"
src = "https://www.tutorialspoint.com/bootstrap/images/slide2.png"
alt = "Second slide">
</div>
<div class = "carousel-item">
<img class = "d-block w-100"
src = "https://www.tutorialspoint.com/bootstrap/images/slide3.png"
alt = "Third slide">
</div>
</div>
<a class = "carousel-control-prev" href = "#carouselExampleFade" 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 = "#carouselExampleFade" role = "button" data-slide = "next">
<span class = "carousel-control-next-icon" aria-hidden = "true"></span>
<span class = "sr-only">Next</span>
</a>
</div>
</div>
<!-- jQuery first, then Popper.js, then Bootstrap JS -->
<script src = "https://code.jquery.com/jquery-3.3.1.slim.min.js"
integrity = "sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo"
crossorigin = "anonymous">
</script>
<script src = "https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js"
integrity = "sha384-ZMP7rVo3mIykV+2+9J3UJ46jBk0WLaUAdn689aCwoqbBJiSnjAK/l8WvCWPIPm49"
crossorigin = "anonymous">
</script>
<script src = "https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js"
integrity = "sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy"
crossorigin = "anonymous">
</script>
</body>
</html>Isso produzirá o seguinte resultado -