JSFiddle - React, Tailwind, and code Playground
HTML
<div id="parent">
<div id="margin">
blah<br />
blah<br />
blah<br />
blah<br />
</div>
<div style="clear:both;"></div>
</div>
CSS
#parent{
position:absolute;
right:20%;
width:60%;
background: #ccc;
margin-top:-1px;
}
#margin{
width:15%;
padding-right:12px;
margin-top:-5px;
padding-top:5px;
float:left;
background:#000;
color:#fff;
}
JavaScript
// Div child needs to have height of 100% of div parent