index.html

<!DOCTYPE html>
<html lang="en">
<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>JKCSS DEMO</title>


<link rel="stylesheet" href="https://jkcss-css-framework.github.io/JKCSS-Framework/jkcss/jkcss.min.css">

</head>
<body>

<!-- You can customize following content -->
<button class="jkbtn jk-blue">HI all</button>

</body>
</html>