index.html

<!DOCTYPE html>

<html>
    <head>

        <meta name="format-detection" content="telephone=no">
        <meta name="msapplication-tap-highlight" content="no">
        <meta name="viewport" content="user-scalable=no, initial-scale=1, maximum-scale=1, minimum-scale=1, width=device-width">

        <title>Hello World</title>
    </head>

        <body>
            <button onclick="alert('click')">Click me</button>
            <div id="map-canvas"></div>
            <script type="text/javascript" src="cordova.js"></script>
            
        </body>
        
        <style>
            
            html, body{
                width:100%;
                height: 100%;
                margin:20px;
                padding:0;
            }
        
        #map-canvas{
            height:80%;
            width:100%;
            background:blue;
        }
        
        button{
            height:100px;
        }
        

        </style>
        

</html>