Bootstrap 4 - Barre de navigation
La description
Navbar fournit des en-têtes de navigation pour votre application ou votre site. Les barres de navigation se réduisent dans les vues mobiles et deviennent horizontales à mesure que la largeur de la fenêtre disponible augmente.
Barre de navigation de base
Pour créer une barre de navigation de base, ajoutez la classe .navbar avec la classe de réduction réactive .navbar-expand-xl | lg | md | sm (fournit une barre de navigation sur des écrans très grands, grands, moyens ou petits). Pour ajouter des liens à la barre de navigation, ajoutez simplement une liste non ordonnée avec la classe .navbar-nav . Pour définir chaque élément de liste individuel, ajoutez la classe .nav-item à l'élément <li> et utilisez la classe .nav-link vers un élément <a> pour les liens individuels.
L'exemple suivant montre la création d'une barre de navigation de base -
Exemple
<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 Navbar</h2>
<nav class = "navbar navbar-expand-sm navbar-dark bg-secondary">
<a class = "navbar-brand" href = "#">Navbar</a>
<button class = "navbar-toggler" type = "button" data-toggle = "collapse"
data-target = "#navbarSupportedContent"
aria-controls = "navbarSupportedContent" aria-expanded = "false"
aria-label = "Toggle navigation">
<span class = "navbar-toggler-icon"></span>
</button>
<div class = "collapse navbar-collapse" id = "navbarSupportedContent">
<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 = "#">About Us</a>
</li>
<li class = "nav-item">
<a class = "nav-link" href = "#">Contact</a>
</li>
</ul>
</div>
</nav>
</div>
<!-- jQuery library -->
<script src = "https://code.jquery.com/jquery-3.2.1.slim.min.js"
integrity = "sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN"
crossorigin = "anonymous">
</script>
<!-- Popper -->
<script src =" https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"
integrity = "sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q"
crossorigin = "anonymous">
</script>
<!-- Latest compiled and minified Bootstrap JavaScript -->
<script src = "https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"
integrity = "sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl"
crossorigin = "anonymous">
</script>
</body>
</html>Il produira le résultat suivant -
Production
Logo de la marque
La marque ou le logo de la page peut être mis en évidence en utilisant la classe de marque .navbar comme indiqué dans l'exemple ci-dessous -
Exemple
<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>Brand</h2>
<nav class = "navbar navbar-expand-sm bg-secondary navbar-dark">
<a class = "navbar-brand" href = "#">Logo</a>
<ul class = "navbar-nav">
<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 = "#">About Us</a>
</li>
<li class = "nav-item">
<a class = "nav-link" href = "#">Contact</a>
</li>
</ul>
</nav>
<br>
<h2>Image Logo</h2>
<nav class = "navbar navbar-expand-sm bg-secondary navbar-dark">
<a class = "navbar-brand" href = "#">
<img src = "https://www.tutorialspoint.com/bootstrap/images/logo.png"
style = "width:120px;" alt = "">
</a>
<ul class = "navbar-nav">
<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 = "#">About Us</a>
</li>
<li class = "nav-item">
<a class = "nav-link" href = "#">Contact</a>
</li>
</ul>
</nav>
</div>
<!-- jQuery library -->
<script src = "https://code.jquery.com/jquery-3.2.1.slim.min.js"
integrity = "sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN"
crossorigin = "anonymous">
</script>
<!-- Popper -->
<script src = "https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"
integrity = "sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q"
crossorigin = "anonymous">
</script>
<!-- Latest compiled and minified Bootstrap JavaScript -->
<script src = "https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"
integrity = "sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl"
crossorigin = "anonymous">
</script>
</body>
</html>Il produira le résultat suivant -
Production
Navbar avec Dropdown
Navbar peut avoir un menu déroulant en ajoutant le code déroulant à l'élément <li> à l'aide de la classe .dropdown . L'exemple suivant illustre ceci -
Exemple
<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>Navbar With Dropdown</h2>
<nav class = "navbar navbar-expand-sm bg-secondary navbar-dark">
<a class = "navbar-brand" href = "#">Navbar</a>
<button class = "navbar-toggler" type = "button" data-toggle = "collapse"
data-target = "#navbarNavDropdown" aria-controls = "navbarNavDropdown"
aria-expanded = "false" aria-label = "Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class = "collapse navbar-collapse" id = "navbarNavDropdown">
<ul class = "navbar-nav">
<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 = "#">About Us</a>
</li>
<li class = "nav-item">
<a class = "nav-link" href = "#">Contact</a>
</li>
<li class = "nav-item dropdown">
<a class = "nav-link dropdown-toggle" href = "#"
id = "navbarDropdownMenuLink" role = "button" data-toggle = "dropdown"
aria-haspopup = "true" aria-expanded = "false">
Library
</a>
<div class = "dropdown-menu" aria-labelledby = "navbarDropdownMenuLink">
<a class = "dropdown-item" href = "#">HTML-5</a>
<a class = "dropdown-item" href = "#">CSS-3</a>
<a class = "dropdown-item" href = "#">Bootstrap-4</a>
</div>
</li>
</ul>
</div>
</nav>
</div>
<!-- jQuery library -->
<script src = "https://code.jquery.com/jquery-3.2.1.slim.min.js"
integrity =" sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN"
crossorigin = "anonymous">
</script>
<!-- Popper -->
<script src = "https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"
integrity = "sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q"
crossorigin = "anonymous">
</script>
<!-- Latest compiled and minified Bootstrap JavaScript -->
<script src = "https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"
integrity = "sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl"
crossorigin =" anonymous">
</script>
</body>
</html>Il produira le résultat suivant -
Production
Barre de navigation avec formulaires et boutons
Vous pouvez créer des contrôles de formulaire et des boutons dans la barre de navigation en utilisant la classe form-inline sur l'élément <form> comme indiqué dans l'exemple ci-dessous -
Exemple
<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>Navbar with Form and Button</h2>
<nav class = "navbar navbar-expand-sm bg-secondary navbar-dark">
<form class = "form-inline">
<input class = "form-control mr-sm-2" type = "text" placeholder = "Search your product">
<button class = "btn btn-info" type = "submit">Search</button>
</form>
</nav>
</div>
<!-- jQuery library -->
<script src = "https://code.jquery.com/jquery-3.2.1.slim.min.js"
integrity = "sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN"
crossorigin = "anonymous">
</script>
<!-- Popper -->
<script src = "https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"
integrity = "sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q"
crossorigin = "anonymous">
</script>
<!-- Latest compiled and minified Bootstrap JavaScript -->
<script src = "https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"
integrity = "sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl"
crossorigin = "anonymous">
</script>
</body>
</html>Il produira le résultat suivant -
Production
Barres de navigation colorées
Changez la couleur de l'arrière-plan de la barre de navigation en utilisant des utilitaires de couleur d'arrière-plan (.bg- *) tels que bg-primary , bg-dark, etc.
Exemple
<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>Colored Navbars</h2>
<nav class = "navbar navbar-expand-sm bg-light navbar-light">
<a class = "navbar-brand" href = "#">Navbar</a>
<button class = "navbar-toggler" type = "button" data-toggle = "collapse"
data-target = "#navbarSupportedContent"
aria-controls = "navbarSupportedContent" aria-expanded = "false"
aria-label = "Toggle navigation">
<span class = "navbar-toggler-icon"></span>
</button>
<div class = "collapse navbar-collapse" id = "navbarSupportedContent">
<ul class = "navbar-nav">
<li class = "nav-item active">
<a class =" nav-link" href = "#">Home</a>
</li>
<li class = "nav-item">
<a class = "nav-link" href = "#">About Us</a>
</li>
<li class = "nav-item">
<a class = "nav-link" href = "#">Contact</a>
</li>
</ul>
</div>
</nav>
<br>
<nav class = "navbar navbar-expand-sm bg-secondary navbar-light">
<a class = "navbar-brand" href = "#">Secondary Navbar</a>
<button class = "navbar-toggler" type = "button" data-toggle = "collapse"
data-target = "#navbarSupportedContent"
aria-controls = "navbarSupportedContent" aria-expanded = "false"
aria-label = "Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class = "collapse navbar-collapse" id = "navbarSupportedContent">
<ul class = "navbar-nav">
<li class = "nav-item active">
<a class = "nav-link" href = "#">Home</a>
</li>
<li class = "nav-item">
<a class = "nav-link" href = "#">About Us</a>
</li>
<li class = "nav-item">
<a class = "nav-link" href = "#">Contact</a>
</li>
</ul>
</div>
</nav>
<br>
<nav class = "navbar navbar-expand-sm bg-dark navbar-light">
<a class = "navbar-brand" href = "#">Dark Navbar</a>
<button class = "navbar-toggler" type = "button" data-toggle = "collapse"
data-target = "#navbarSupportedContent"
aria-controls = "navbarSupportedContent" aria-expanded = "false"
aria-label = "Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class = "collapse navbar-collapse" id = "navbarSupportedContent">
<ul class = "navbar-nav">
<li class = "nav-item active">
<a class = "nav-link" href = "#">Home</a>
</li>
<li class = "nav-item">
<a class = "nav-link" href = "#">About Us</a>
</li>
<li class = "nav-item">
<a class = "nav-link" href = "#">Contact</a>
</li>
</ul>
</div>
</nav>
<br>
<nav class = "navbar navbar-expand-sm bg-primary navbar-light">
<a class = "navbar-brand" href = "#">Primary Navbar</a>
<button class = "navbar-toggler" type = "button" data-toggle = "collapse"
data-target = "#navbarSupportedContent"
aria-controls = "navbarSupportedContent" aria-expanded = "false"
aria-label = "Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class = "collapse navbar-collapse" id = "navbarSupportedContent">
<ul class = "navbar-nav">
<li class = "nav-item active">
<a class = "nav-link" href = "#">Home</a>
</li>
<li class = "nav-item">
<a class = "nav-link" href = "#">About Us</a>
</li>
<li class = "nav-item">
<a class = "nav-link" href = "#">Contact</a>
</li>
</ul>
</div>
</nav>
<br>
<nav class = "navbar navbar-expand-sm bg-success navbar-light">
<a class = "navbar-brand" href = "#">Success Navbar</a>
<button class = "navbar-toggler" type = "button" data-toggle = "collapse"
data-target = "#navbarSupportedContent"
aria-controls = "navbarSupportedContent" aria-expanded = "false"
aria-label = "Toggle navigation">
<span class = "navbar-toggler-icon"></span>
</button>
<div class = "collapse navbar-collapse" id = "navbarSupportedContent">
<ul class = "navbar-nav">
<li class = "nav-item active">
<a class = "nav-link" href = "#">Home</a>
</li>
<li class = "nav-item">
<a class = "nav-link" href = "#">About Us</a>
</li>
<li class = "nav-item">
<a class = "nav-link" href = "#">Contact</a>
</li>
</ul>
</div>
</nav>
<br>
<nav class = "navbar navbar-expand-sm bg-info navbar-light">
<a class = "navbar-brand" href = "#">Info Navbar</a>
<button class = "navbar-toggler" type = "button" data-toggle = "collapse"
data-target = "#navbarSupportedContent"
aria-controls = "navbarSupportedContent" aria-expanded = "false"
aria-label = "Toggle navigation">
<span class = "navbar-toggler-icon"></span>
</button>
<div class = "collapse navbar-collapse" id = "navbarSupportedContent">
<ul class = "navbar-nav">
<li class = "nav-item active">
<a class = "nav-link" href = "#">Home</a>
</li>
<li class = "nav-item">
<a class = "nav-link" href = "#">About Us</a>
</li>
<li class = "nav-item">
<a class = "nav-link" href = "#">Contact</a>
</li>
</ul>
</div>
</nav>
<br>
<nav class = "navbar navbar-expand-sm bg-warning navbar-light">
<a class = "navbar-brand" href = "#">Warning Navbar</a>
<button class = "navbar-toggler" type = "button" data-toggle = "collapse"
data-target = "#navbarSupportedContent"
aria-controls = "navbarSupportedContent" aria-expanded = "false"
aria-label = "Toggle navigation">
<span class = "navbar-toggler-icon"></span>
</button>
<div class = "collapse navbar-collapse" id = "navbarSupportedContent">
<ul class = "navbar-nav">
<li class = "nav-item active">
<a class = "nav-link" href = "#">Home</a>
</li>
<li class = "nav-item">
<a class = "nav-link" href = "#">About Us</a>
</li>
<li class = "nav-item">
<a class = "nav-link" href = "#">Contact</a>
</li>
</ul>
</div>
</nav>
<br>
<nav class = "navbar navbar-expand-sm bg-danger navbar-light">
<a class = "navbar-brand" href = "#">Danger Navbar</a>
<button class = "navbar-toggler" type = "button" data-toggle = "collapse"
data-target = "#navbarSupportedContent"
aria-controls = "navbarSupportedContent" aria-expanded = "false"
aria-label = "Toggle navigation">
<span class = "navbar-toggler-icon"></span>
</button>
<div class = "collapse navbar-collapse" id = "navbarSupportedContent">
<ul class = "navbar-nav">
<li class = "nav-item active">
<a class = "nav-link" href = "#">Home</a>
</li>
<li class = "nav-item">
<a class = "nav-link" href = "#">About Us</a>
</li>
<li class = "nav-item">
<a class = "nav-link" href = "#">Contact</a>
</li>
</ul>
</div>
</nav>
</div>
<!-- jQuery library -->
<script src = "https://code.jquery.com/jquery-3.2.1.slim.min.js"
integrity = "sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN"
crossorigin = "anonymous">
</script>
<!-- Popper -->
<script src = "https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"
integrity = "sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q"
crossorigin = "anonymous">
</script>
<!-- Latest compiled and minified Bootstrap JavaScript -->
<script src = "https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"
integrity = "sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl"
crossorigin = "anonymous">
</script>
</body>
</html>Il produira le résultat suivant -
Production
Barre de navigation fixe
La barre de navigation Bootstrap peut être dynamique dans son positionnement. Vous pouvez le placer en haut en ajoutant la classe .fixed-top à la classe .navbar . L'exemple suivant illustre ceci -
Exemple
<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 style = "height:2000px">
<div class = "container">
<nav class = "navbar navbar-expand-sm bg-dark navbar-dark fixed-top">
<a class = "navbar-brand" href = "#">Fixed Top</a>
<ul class = "navbar-nav">
<li class = "nav-item active">
<a class = "nav-link" href = "#">Home</a>
</li>
<li class = "nav-item">
<a class = "nav-link" href = "#">About Us</a>
</li>
<li class = "nav-item">
<a class = "nav-link" href = "#">Contact</a>
</li>
</ul>
</nav>
<div class = "container-fluid" style = "margin-top:80px">
<h4>This is Fixed Navigation Bar...Scroll this page to see the effect</h4>
</div>
</div>
<!-- jQuery library -->
<script src = "https://code.jquery.com/jquery-3.2.1.slim.min.js"
integrity = "sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN"
crossorigin = "anonymous">
</script>
<!-- Popper -->
<script src = "https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"
integrity = "sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q"
crossorigin = "anonymous">
</script>
<!-- Latest compiled and minified Bootstrap JavaScript -->
<script src =" https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"
integrity = "sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin = "anonymous">
</script>
</body>
</html>Il produira le résultat suivant -
Production
Barre de navigation inférieure
Si vous souhaitez que la barre de navigation soit fixée au bas de la page, ajoutez la classe .fixed-bottom à la classe .navbar . L'exemple suivant illustre ceci -
Exemple
<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 style = "height:2000px">
<div class = "container">
<nav class = "navbar navbar-expand-sm bg-dark navbar-dark fixed-bottom">
<a class = "navbar-brand" href = "#">Fixed Bottom</a>
<ul class = "navbar-nav">
<li class = "nav-item active">
<a class = "nav-link" href = "#">Home</a>
</li>
<li class = "nav-item">
<a class = "nav-link" href = "#">About Us</a>
</li>
<li class = "nav-item">
<a class = "nav-link" href = "#">Contact</a>
</li>
</ul>
</nav>
<div class = "container-fluid" style = "margin-top:80px">
<h4>This is Bottom Fixed Navigation Bar...Scroll this page to see the effect</h4>
</div>
</div>
<!-- jQuery library -->
<script src = "https://code.jquery.com/jquery-3.2.1.slim.min.js"
integrity = "sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN"
crossorigin = "anonymous">
</script>
<!-- Popper -->
<script src =" https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"
integrity = "sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q"
crossorigin = "anonymous">
</script>
<!-- Latest compiled and minified Bootstrap JavaScript -->
<script src = "https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"
integrity = "sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl"
crossorigin = "anonymous">
</script>
</body>
</html>Il produira le résultat suivant -
Production
Barre de navigation collante
Vous pouvez fixer la barre de navigation en haut de la page, lorsque vous faites défiler la page en utilisant la classe .sticky-top qui sera ajoutée à la classe .navbar . L'exemple suivant illustre ceci -
Exemple
<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 style = "height:2000px">
<div class = "container-fluid">
<div class = "container-fluid" style = "margin-top:80px">
<h4>This is Sticky Navigation Bar...Scroll this page to see the effect</h4>
</div>
</div>
<nav class = "navbar navbar-expand-sm bg-dark navbar-dark sticky-top">
<a class = "navbar-brand" href = "#">Sticky Top</a>
<ul class = "navbar-nav">
<li class = "nav-item active">
<a class = "nav-link" href = "#">Home</a>
</li>
<li class = "nav-item">
<a class = "nav-link" href = "#">About Us</a>
</li>
<li class = "nav-item">
<a class = "nav-link" href = "#">Contact</a>
</li>
</ul>
</nav>
<!-- jQuery library -->
<script src = "https://code.jquery.com/jquery-3.2.1.slim.min.js"
integrity = "sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN"
crossorigin = "anonymous">
</script>
<!-- Popper -->
<script src = "https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"
integrity = "sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q"
crossorigin = "anonymous">
</script>
<!-- Latest compiled and minified Bootstrap JavaScript -->
<script src = "https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"
integrity = "sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl"
crossorigin = "anonymous">
</script>
</body>
</html>Il produira le résultat suivant -