The first commented line is your dabblet’s title

dabblet.css

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

.container {
	display: flex;
	border: solid 1px red;
	//overflow: scroll; 
	//resize: both;
}

span {
	display: inline-block;
	border: solid 1px;
}

.thing {
display: block;
	flex: 1 1 auto;
	width: 200px;
}

dabblet.html

<div class="container">
<span>something</span>
<span>something</span>
<span class="thing">
something
	<span>

</span>
</div>

dabblet.js

// alert('Hello world!');

settings.json

{"view":"separate","fontsize":"100","seethrough":"","prefixfree":"1","page":"all"}