Html
<html>
<!-- title -->
<head>
<meta charset="utf-8">
<title>Example</title>
</head>
<body>
<!-- connect library jQuery -->
<script src="https://dir.by/example_lib/jquery/jquery-3.3.1.min.js"></script>
<!-- connect library Bootstrap (js file) -->
<script src="https://dir.by/example_lib/bootstrap-4.1.3/js/bootstrap.min.js"></script>
<!-- connect library Bootstrap (css file) -->
<link rel="stylesheet" href="https://dir.by/example_lib/bootstrap-4.1.3/css/bootstrap.min.css">
<!-- HTML Elements -->
<nav class="navbar navbar-expand-sm bg-dark navbar-dark">
<a class="navbar-brand" href="#">Logo</a>
<ul class="navbar-nav">
<li class="nav-item active">
<a class="nav-link" href="#">Active1</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Link2</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Link3</a>
</li>
<li class="nav-item">
<a class="nav-link disabled" href="#">Disabled4</a>
</li>
</ul>
</nav>
</body>
</html>
Html
<html>
<!-- title -->
<head>
<meta charset="utf-8">
<title>Example</title>
</head>
<body>
<!-- connect library jQuery -->
<script src="https://dir.by/example_lib/jquery/jquery-3.3.1.min.js"></script>
<!-- connect library Bootstrap (js file) -->
<script src="https://dir.by/example_lib/bootstrap-4.1.3/js/bootstrap.min.js"></script>
<!-- connect library Bootstrap (css file) -->
<link rel="stylesheet" href="https://dir.by/example_lib/bootstrap-4.1.3/css/bootstrap.min.css">
<nav class="navbar navbar-expand-lg navbar-light bg-light">
<!-- the reduced version appears when there is no space -->
<a class="navbar-brand" href="#">Navbar</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#myNavbarMenu" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<!-- all elements -->
<div class="collapse navbar-collapse" id="myNavbarMenu">
<ul class="navbar-nav mr-auto">
<!-- link -->
<li class="nav-item">
<a class="nav-link" href="#">Link</a>
</li>
<!-- combo box -->
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
Dropdown1
</a>
<div class="dropdown-menu" aria-labelledby="navbarDropdown">
<a class="dropdown-item" href="#">Home</a>
<a class="dropdown-item" href="#">Work</a>
<div class="dropdown-divider"></div>
<a class="dropdown-item" href="#">Book</a>
</div>
</li>
</ul>
<!-- form -->
<form class="form-inline my-2 my-lg-0">
<input class="form-control mr-sm-2" type="search" placeholder="Search">
<button class="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
</form>
</div>
</nav>
</body>
</html>
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