The first commented line is your dabblet’s title

dabblet.css

/**
 * The first commented line is your dabblet’s title
 */

background: #f06;
background: linear-gradient(45deg, #f06, yellow);
min-height: 100%;

dabblet.html

<script type="text/javascript">
var frame = document.createElement('iframe');
frame.src = "http://localhost:8000";

setTimeout(function(){
    document.getElementsByTagName('body')[0].appendChild(frame);
}, 0);


var receiveMessage = function(evt){
    var data = evt.data;
    if (data.indexOf('uuid:') == 0) {
        var uuid = data.substring(5, data.length);        
        
        console.log(uuid);
    }
}

window.addEventListener("message", receiveMessage, false);
</script>

settings.json

{"view":"split","seethrough":"","prefixfree":"1","page":"all"}