I'm having a bit of an issue where my dropdown won't work using bootstrap. The dropdown only appears from screens smaller than the $md variable.
The issue is when I click the dropdown icon it doesn't seem to be working I have the HTML code below but if you want the whole project take a look at this Github repo
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" href="css/style.css">
<title>Sass-Bootstrap Example</title>
</head>
<body>
<nav class="navbar navbar-expand-lg navbar-light bg-primary ">
<a class="navbar-brand text-primary_invert px-3" href="#">Navbar</a>
<button class="navbar-toggler bg-primary_invert" 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 text-primary_invert" href="#">Home <span class="sr-only">(current)</span></a>
</li>
<li class="nav-item">
<a class="nav-link text-primary_invert" href="#">Features</a>
</li>
<li class="nav-item">
<a class="nav-link text-primary_invert" href="#">Pricing</a>
</li>
<li class="nav-item">
<a class="nav-link disabled text-primary_invert" href="#">Disabled</a>
</li>
</ul>
</div>
</nav>
<script src="/dist/js/bootstrap.bundle.min.js"></script>
</body>
</html>
try adding the JQuery & Popper.js links
<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://cdn.jsdelivr.net/npm/popper.js@1.12.9/dist/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
<script src="https://cdn.jsdelivr.net/npm/bootstrap@4.0.0/dist/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>