tool.html

<!DOCTYPE html>
<html>
<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>popup</title>
</head>
<body>
<div id="page" style="width: 800px;height: 550px;margin: 0 auto;padding: 0 6px;overflow-y:auto;">
    <div id="app"></div>
</div>
<div id="clipboard"></div>
</body>
</html>