Untitled

dabblet.css

body
{
	background: pink
}

.popup
{
	position: relative;
	
	width: 200px;
	height: 150px;
	padding: 10px;
	
	background: #fff;
	background-clip: padding-box;	
	border: 5px solid rgba(0,0,0,0.6);	
}

.tail,
.cutter
{
	position: absolute;
	left: 100%;
	top: 10px;
	overflow: hidden;	
	
	width: 18px;
	height: 35px;	
}

.tail
{
	margin-left: 5px;
}

.cutter
{
	width: 5px;
}

.cutter:after,
.tail:after
{
	position: absolute;
	top: 0;
	left: -20px;
	
	width: 25px;
	height: 25px;
	
	transform: rotate(45deg);
	
	background: #fff;
	border: 5px solid rgba(0,0,0,0.6);
	background-clip: padding-box;
	
	content: ''
}

.tail:after
{
	margin-left: -5px;
}

.cutter:after
{
	border-color: transparent;
}

dabblet.html

<div class="popup">
	<div class="tail"></div>
	<div class="cutter"></div>
	контент
</div>

dabblet.js

// alert('Hello world!');

settings.json

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