<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Vanilla Javascript DropDown Menu Example</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" type="text/css" href="style.css">
</head>
<body>
<div id="menu-dropdown">Menu ▼</div>
<div id="menuDiv-dropdown" class="invisible">
content<br>content<br>content
</div>
<script src="vanilla-javascript-dropdown-menu-example.js"></script>
</body>
</html>