I applid a code from video lesson but the ruselt wasnt the same because we didnt use the same BS version , I use BS V4 and he use BS V3.3.4
when I changed it to the same BS it worked
is it necessary to use the same BS to get the same result
this is his code with Bootstrab V3.4.4
<!DOCTYPE html>
<html lang="en">
<head>
<title>thenewboston</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
<script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/js/bootstrap.min.js"></script>
</head>
<body>
<nav class="navbar navbar-default">
<div class="container-fluid">
<!-- Logo -->
<div class="navbar-header">
<a href="#" class="navbar-brand">THENEWBOSTON</a>
</div>
<!-- Menu Items -->
<div>
<ul class="nav navbar-nav">
<li class="active"><a href="#">Home</a></li>
<li><a href="#">About</a></li>
<li><a href="#">Contact</a></li>
</ul>
</div>
</div>
</nav>
</body>
</html>
and this is the same code but with Bootstrab V4
<!DOCTYPE html>
<html lang="en">
<head>
<title>thenewboston</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css">
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"></script>
</head>
<body>
<nav class="navbar navbar-default">
<div class="container-fluid">
<!-- Logo -->
<div class="navbar-header">
<a href="#" class="navbar-brand">THENEWBOSTON</a>
</div>
<!-- Menu Items -->
<div>
<ul class="nav navbar-nav">
<li class="active"><a href="#">Home</a></li>
<li><a href="#">About</a></li>
<li><a href="#">Contact</a></li>
</ul>
</div>
</div>
</nav>
</body>
</html>