Notibar.js - Lightweight notification bar, no dependency.
<script type="text/javascript" src="https://duyetdev.github.io/notibar.js/notibar.js"></script>
<script type="text/javascript">
notiBar('<strong>notibar.js</strong> by <a href="https://duyet.net">duyetdev</a> :))');
</script>See example: https://duyetdev.github.io/notibar.js/example.html
More custom
notiBar({
message: '<strong>notibar.js</strong> by <a href="https://duyet.net">duyetdev</a> :))',
closeButton: true,
font: 'sans-serif',
fontSize: '13px',
minHeight: '41px',
color: '#2895F1',
bgColor: '#f0f9ff',
borderBottomColor: '#96c4ea',
});