index.html
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Transparent Window</title>
<style>
html, body {
margin:0;
}
body {
width:100%;
height:100%;
background-color:blue;
color:white;
-webkit-app-region: drag;
overflow-x:none;
}
</style>
</head>
<body>
<h1>I am stuff</h1>
</body>
</html>