<!DOCTYPE html>
<html lang="ko">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title></title>
    <style>
        body {
            margin:0;
        }
        .cover {
            background-color:black;
            height:100%;
        }
    </style>
</head>
<body>
    <div class="cover">wow</div>
</body>
</html>

External CSS

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External JavaScript

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