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

<div style=" border: 1px solid #000; display: block; height:400px;">

  <textarea style="width:40%;float:left; height:100%;">Text area</textarea>

  <div style="width:45%; float:right; height:300px; border: 1px solid #000; ">

</div>

</div>

dabblet.js

// alert('Hello world!');

settings.json

{"view":"split-vertical","fontsize":"100","seethrough":"","prefixfree":"1","page":"html"}