JSFiddle - React, Tailwind, and code Playground

HTML

<header>
	<div id="testo-header">
		dscdswcdscd
	</div>
	
	
	<div id="freccia-header">
		<a href=""></a>
	</div>
</header>

CSS

body, html {height: 100%;}
header
{
    position:relative;
	height: 70px;
    background:#fff url(http://www.dcodes.net/2/sliders/revolution/images/slide1_a.jpg) no-repeat center center;
    background-size:cover;
    box-shadow:inset 0 -1px 5px rgba(0,0,0,0.6);
}

JavaScript

console.log('bella');