MORE BUTTON WITH CSS
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>HTML</title>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
<style>
	.navbar {
	  overflow: hidden;
	  background-color: cyan;
	  width: 200px;
	  
	}
	.navbar a {
	  float: none;
	  display: block;
	  color: black;
	  text-align: center;
	  padding: 14px 16px;
	  text-decoration: none;
	  font-size: 20px;
	  
	}
	.active {
	  background-color: #04AA6D;
	  color: white;
	}
	.navbar .icon {
	  display: none;
	}
	.more {
	  float: left;
	  overflow: hidden;
	}
	.more .btn {
	  font-size: 20px;    
	  border: none;
	  outline: none;
	  color: black;
	  padding: 14px 16px;
	  background-color: inherit;
	  font-family: inherit;
	  margin-left: 60px;
	  
	  
	}
	.more-menu {
	  display: none;
	  position: absolute;
	  background-color: #f9f9f9;
	  min-width: 200px;
	  box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
	  z-index: 1;
	}
	.more-menu a {
	  float: none;
	  color: black;
	  padding: 12px 16px;
	  text-decoration: none;
	  display: block;
	  text-align: left;
	}
	.navbar a:hover, .more:hover .btn {
	  background-color: #555555;
	  color: white;
	}

	.dropdown-menu a:hover {
	  background-color: #cccccc;
	  color: black;
	}
	.more:hover .more-menu {
	  display: block;
	}
	
</style>
</head>
<body>
    <h2>Hover over more button</h2>
	<div class="navbar" id="nav">
	  <a href="#" class="active">Home</a>
	  <a href="#">course</a>
	  <a href="#">study</a>
	  <div class="more">
		<button class="btn">More 
		  <i class="fa fa-caret-down"></i>
		</button>
		<div class="more-menu">
		  <a href="#">Item 1</a>
		  <a href="#">Item 2</a>
		  <a href="#">Item 3</a>
		</div>
	  </div>
</div>
</body>
</html>