index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<link rel="icon" href="" type="text/image" sizes="32x32">
<title>Document</title>
<script src='./js/jquery/jquery/jquery.js'></script>
<script src='./js/index.js'></script>
<style>
.wrap{
width: 200px;
height: 200px;
background-color: #ff0000;
}
</style>
</head>
<body>
<div class="wrap">
<div class="box"></div>
</div>
</body>
</html>