border-box

dabblet.css

/**
 * border-box
 */

* {box-sizing: border-box;}
.non-border-box {
	box-sizing: content-box;
}
div {
	border: 2px solid blue;
	height: 100px;
	width: 100px;
	padding: 0 10px;
	margin: 0 10px;
}
.inline-block {
	display: inline-block;
}

dabblet.html

<div class="non-border-box"></div>
<div></div>
<div class="inline-block">
</div>
<div class="float">
</div>

dabblet.js

// alert('Hello world!');

settings.json

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