jHtmlArea two-lines for line break
Line break requires an empty/blank line.
HTML
<script type="text/javascript" src="https://pietschsoft.com/Demo/jHtmlArea/scripts/jHtmlArea-0.8.alpha.min.js"></script>
<script type="text/javascript" src="https://pietschsoft.com/Demo/jHtmlArea/scripts/jHtmlArea.ColorPickerMenu-0.8.alpha.min.js"></script>
<!--http://rs.01298.com/rs/lib/js/jHtmlArea-0.8.min.js-->
<link rel="stylesheet" href="https://pietschsoft.com/Demo/jHtmlArea/content/jHtmlArea/jHtmlArea.ColorPickerMenu.css">
<link rel="stylesheet" href="https://pietschsoft.com/Demo/jHtmlArea/content/jHtmlArea/jHtmlArea.css">
<link rel="stylesheet" href="https://pietschsoft.com/Demo/jHtmlArea/content/bootstrap/bootstrap.min.css">
<div>
<textarea cols=60 rows=100></textarea>
</div>
JavaScript
$('document').ready(function() {
$('textarea').htmlarea();
});