Cannot load Bootstrap 4 from a CDN - html

Linking from a CDN gives me a weird-looking navbar. Linking from local files, however, gives me the correct output.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<!--[if IE]><meta http-equiv="X-UA-Compatible" content="IE=edge" /><![endif]-->
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<meta name="description" content="">
<meta name="author" content="">
<title>base template title</title>
<!-- Bootstrap core CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css" integrity="sha384-rwoIResjU2yc3z8GV/NPeZWAv56rSmLldC3R/AZzGRnGxQQKnKkoFVhFQhNUwEyJ" crossorigin="anonymous">
</head>
<body>
<nav class="navbar navbar-expand-md navbar-inverse bg-inverse mb-4">
<a class="navbar-brand" href="#">Top 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>
<script src="https://code.jquery.com/jquery-3.1.1.slim.min.js" integrity="sha384-A7FZj7v+d/sdmMqp/nOQwliLvUsJfDHW+k9Omg/a/EheAdgtzNs3hpfag6Ed950n" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/tether/1.4.0/js/tether.min.js" integrity="sha384-DztdAPBWPRXSA/3eYEEUWrWCy7G5KFbe8fFjk5JAIxUYHKkDx6Qin1DkWx51bBrb" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/js/bootstrap.min.js" integrity="sha384-vBWWzlZJ8ea9aCX4pEW3rVHjgjt7zpkNpZk+02D9phzyeVkE+jo0ieGizqPLForn" crossorigin="anonymous"></script>
</html>
I'm using Safari Version 10.1 (12603.1.30.0.34) under macOS Sierra Version 10.12.4 (16E195)
What am I doing wrong?

Related

Bootstrap fixed-top behaviour between PC and mobile

I am comparing the fixed-top when in mobile and when in desktop. My code is below where I initially found in https://getbootstrap.com/docs/4.0/examples/navbar-top-fixed/. The weird thing is in desktop.. The fixed navbar will go along in any part of the screen.. In my code below it is a 300px navbar and when I scroll horizontally it is there. But when I check in mobile view the fixed behaviour will not work anymore. Basically, it will not go along when I scroll horizontally. It will just stay on its original position.. Is there a way to make my nav in mobile behave the same as when in PC? Take note that when I say mobile, I am just using the mobile view in Chrome and Samsung S5
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<meta name="description" content="">
<meta name="author" content="">
<link rel="icon" href="/docs/4.0/assets/img/favicons/favicon.ico">
<title>Fixed top navbar example for Bootstrap</title>
<link rel="canonical" href="https://getbootstrap.com/docs/4.0/examples/navbar-top-fixed/">
<!-- Bootstrap core CSS -->
<link href="https://getbootstrap.com/docs/4.0/dist/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<nav class="navbar navbar-dark fixed-top bg-dark" style="width: 320px">
<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>
<main role="main" class="container" style="width: 3000px; max-width: 3000px">
<div class="jumbotron">
<h1>Navbar example</h1>
<p class="lead">This example is a quick exercise to illustrate how fixed to top navbar works. As you scroll, it will remain fixed to the top of your browser's viewport.</p>
<a class="btn btn-lg btn-primary" href="../../components/navbar/" role="button">View navbar docs »</a>
</div>
</main>
<!-- Bootstrap core JavaScript
================================================== -->
<!-- Placed at the end of the document so the pages load faster -->
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
<script>window.jQuery || document.write('<script src="../../assets/js/vendor/jquery-slim.min.js"><\/script>')</script>
<script src="../../assets/js/vendor/popper.min.js"></script>
<script src="../../dist/js/bootstrap.min.js"></script>
</body>
</html>

ok, So here is the solution for your problem, actually in your case you inner div is way more than body's width and your whole body has a scroll bar, and the position fixed works with the body.
So simple solution to make it work on mobile and desktop as well, just use your width item like that so it will not affect the scroller of the
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<meta name="description" content="">
<meta name="author" content="">
<link rel="icon" href="/docs/4.0/assets/img/favicons/favicon.ico">
<title>Fixed top navbar example for Bootstrap</title>
<link rel="canonical" href="https://getbootstrap.com/docs/4.0/examples/navbar-top-fixed/">
<!-- Bootstrap core CSS -->
<link href="https://getbootstrap.com/docs/4.0/dist/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<nav class="navbar navbar-dark fixed-top bg-dark" style="width: 320px">
<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>
<main role="main" class="container" style="overflow: auto;max-width: 100%;">
<div class="jumbotron" style="width: 3000px; max-width: 3000px">
<h1>Navbar example</h1>
<p class="lead">This example is a quick exercise to illustrate how fixed to top navbar works. As you scroll, it will remain fixed to the top of your browser's viewport.</p>
<a class="btn btn-lg btn-primary" href="../../components/navbar/" role="button">View navbar docs »</a>
</div>
</main>
<!-- Bootstrap core JavaScript
================================================== -->
<!-- Placed at the end of the document so the pages load faster -->
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.4.0/js/bootstrap.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/2.4.0/umd/popper.min.js"></script>
</body>
</html>
whole body.
I just made some small changes to your code, and now it will work on Desktop and mobile as well,

python3 doesn't execute getbootstrap html code

If i run the following code (extract from carousel template in getbootstrap) from a browser it is executed successfully:
<!DOCTYPE html>
<!-- saved from url=(0052)https://getbootstrap.com/docs/4.3/examples/carousel/ -->
<html lang="en"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<meta name="description" content="">
<meta name="generator" content="Jekyll v3.8.5">
<title>Carousel Template · Bootstrap</title>
<link rel="canonical" href="https://xxxxx/">
<!-- Bootstrap core CSS -->
<link rel="stylesheet" type="text/css" href="css/bootstrap.min.css">
<link rel="stylesheet" type="text/css" href="css/jumbotron.css" >
<link rel="stylesheet" type="text/css" href="css/carousel.css" rel="stylesheet">
<link href="./Carousel Template · Bootstrap_files/bootstrap.min.css" rel="stylesheet" crossorigin="anonymous">
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" crossorigin="anonymous"></script>
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
<script type="text/javascript" src="js/jquery-1.9.1.js"></script>
<script type="text/javascript" src="js/bootstrap.js"></script>
<script type="text/javascript" src="js/bootstrap-dropdown.js"></script>
<script type="text/javascript" src="js/jquery-3.3.1.slim.min.js"></script>
<style>
.bd-placeholder-img {
font-size: 1.125rem;
text-anchor: middle;
-webkit-user-select: none;
-moz-user-select: none;
-ms-user-select: none;
user-select: none;
}
#media (min-width: 768px) {
.bd-placeholder-img-lg {
font-size: 3.5rem;
}
}
</style>
<!-- Custom styles for this template -->
</head>
<body>
<!--header-->
<nav class="navbar navbar-expand-md navbar-dark fixed-top bg-dark">
<a class="navbar-brand">XXXXXXX</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 dropdown">
<a class="nav-link dropdown-toggle" href="#" id="dropdown01" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Main menu</a>
<div class="dropdown-menu" aria-labelledby="dropdown01">
<a class="dropdown-item" href="signin.html">Sign In</a>
<a class="dropdown-item" href="register.html">Register</a>
<a class="dropdown-item" href="#">About</a>
</div>
</li>
<li class="nav-item">
<a class="nav-link" href="signin.html">Sign In</a>
</li>
<li class="nav-item">
<a class="nav-link" href="register.html">Register</a>
</li>
<li class="nav-item">
<a class="nav-link disabled" href="https://getbootstrap.com/docs/4.3/examples/carousel/#">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>
<!--/header-->
</body>
</html>
As i replace all href with {{ url_for('static',filename='javascript name or css name')}}
and invoke the page with render_template('testnewhome.html')
I don't get any error in wsgi but look and feel is really different.
Just the let you understand:
html code executed from browser looks this way
good looking
If i run it from python it looks this way
bad looking
Any clue? I m really stuck

it's sorted. There was no problem with the code, you can use it as a reference.
I simply removed all css files from ccs folder and copied them over. It looks like the getbootstrap ditribution files are not good. So i suggest to everyone to download a working page and use the downloaded css and js to create a new page.
HIH

Bootstrap CDN not working

I am trying to embed bootstrap to an html file. I copied and pasted the links directly from their website and have also embedded the newest version of jQuery. The font styles seem to be correct, but the navbar and other classes are not working properly. Below is my code as well as a screenshot of the results.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Bootstrap 101 Template</title>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap-theme.min.css" integrity="sha384-rHyoN1iRsVXV4nD0JutlnGaslCJuC7uwjduW9SVrLvRYooPp2bWYgmgJQIXwl/Sp" crossorigin="anonymous">
</head>
<body>
<h1>Hello, world!</h1>
<nav class="navbar navbar-expand-lg navbar-light bg-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 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 dropdown">
<a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
Dropdown
</a>
<div class="dropdown-menu" aria-labelledby="navbarDropdown">
<a class="dropdown-item" href="#">Action</a>
<a class="dropdown-item" href="#">Another action</a>
<div class="dropdown-divider"></div>
<a class="dropdown-item" href="#">Something else here</a>
</div>
</li>
<li class="nav-item">
<a class="nav-link disabled" href="#">Disabled</a>
</li>
</ul>
<form class="form-inline my-2 my-lg-0">
<input class="form-control mr-sm-2" type="search" placeholder="Search" aria-label="Search">
<button class="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
</form>
</div>
</nav>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>
</body>
</html>
The navbar is one that I copied directly from bootstrap's documentation.
Also, as you can see, there are no errors in the console

You have accidently copied a Bootstrap Theme instead of the actual bootstrap :)
Try using the CDN in https://www.w3schools.com/bootstrap/tryit.asp?filename=trybs_navbar&stacked=h. That seems to work fine.
<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap Example</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>
<nav class="navbar navbar-default">
<div class="container-fluid">
<div class="navbar-header">
<a class="navbar-brand" href="#">WebSiteName</a>
</div>
<ul class="nav navbar-nav">
<li class="active">Home</li>
<li>Page 1</li>
<li>Page 2</li>
<li>Page 3</li>
</ul>
</div>
</nav>
<div class="container">
<h3>Basic Navbar Example</h3>
<p>A navigation bar is a navigation header that is placed at the top of the page.</p>
</div>
</body>
</html>
or for just the <head></head> import
<head>
<title>Bootstrap Example</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>

Bootstrap Navbar is not opening when selecting button

<!DOCTYPE html>
<html>
<head>
<title> Bootstrap navbar </title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" type="text/css" href="bootstrap.min.css">
</head>
<body>
<nav class="navbar navbar-expand-lg navbar-light bg-light">
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarTogglerDemo01" aria-controls="navbarTogglerDemo01" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarTogglerDemo01">
<a class="navbar-brand" href="#">Hidden brand</a>
<ul class="navbar-nav mr-auto mt-2 mt-lg-0">
<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 my-2 my-lg-0">
<input class="form-control mr-sm-2" type="search" placeholder="Search" aria-label="Search">
<button class="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
</form>
</div>
</nav>
<script src="bootstrap.min.js"></script>
<script src="jquery-slim.min.js"></script>
<script src="popper.min.js"></script>
</body>
</html>
here it is my Complete Bootstrap Navbar Code, it is collapsing when we view it on mobile device, but when we select the button to open the Navbar that time it is not opening.

OK, the problem is the sequence of your js files. Jquery file needs to be first in order for other files to work as they are using jquery.
<script src="bootstrap.min.js"></script>
<script src="jquery-slim.min.js"></script>
<script src="popper.min.js"></script>
It will work now.
<script src="jquery-slim.min.js"></script>
<script src="bootstrap.min.js"></script>
<script src="popper.min.js"></script>

Navbar button appears much too wide, when Navbar is collapsed

I created a Navbar with Bootstrap 4. The "Logout" button on the left side in the Navbar appears much to wide, when the navbar is collapsed.
How can I fix the big "Logout" button if the navbar is collapsed??
<!doctype html>
<html lang="de">
<head>
<title>Hello World</title>
<!-- Required meta tags -->
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<!-- Bootstrap CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/css/bootstrap.min.css" integrity="sha384-PsH8R72JQ3SOdhVi3uxftmaW6Vc51MKb0q5P2rRUpPvrszuE4W1povHYgTpBfshb" crossorigin="anonymous">
</head>
<body>
<!-- Navbar -->
<nav class="navbar navbar-expand-lg navbar-dark bg-primary">
<div class="navbar-brand">
<strong>Navbar</strong>
</div>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarNav">
<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="#">Test</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Test2</a>
</li>
</ul>
<ul class="navbar-nav ml-auto">
<li class="nav-item active">
<a class="nav-link btn btn-outline-dark" href="x">Logout<span class="sr-only">(current)</span></a>
</li>
</ul>
</div>
</nav>
<!-- jQuery first, then Popper.js, then Bootstrap JS -->
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.3/umd/popper.min.js" integrity="sha384-vFJXuSJphROIrBnz7yo7oB41mKfc8JzQZiCq4NCceLEaO4IHwicKwpJf9c9IpFgh" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/js/bootstrap.min.js" integrity="sha384-alpBpkh1PFOepccYVYDB4do5UnbKysX5WZXm3XxPqe5iKTfUKjNkCk9SaVuEZflJ" crossorigin="anonymous"></script>
</body>
</html>
Thank you!

put the logout button in a form.form-inline like in the official docs, and the button is no longer stretched.
<!doctype html>
<html lang="de">
<head>
<title>Hello World</title>
<!-- Required meta tags -->
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<!-- Bootstrap CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/css/bootstrap.min.css" integrity="sha384-PsH8R72JQ3SOdhVi3uxftmaW6Vc51MKb0q5P2rRUpPvrszuE4W1povHYgTpBfshb" crossorigin="anonymous">
</head>
<body>
<!-- Navbar -->
<nav class="navbar navbar-expand-lg navbar-dark bg-primary">
<div class="navbar-brand">
<strong>Navbar</strong>
</div>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarNav">
<ul class="navbar-nav">
<li class="nav-item active">
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