JSFiddle - React, Tailwind, and code Playground

HTML

<div id="Header" class="Header">
        <img id="Banner1" src="as"/>
    <h1 id="Banner">test</h1>
    </div>

CSS

#Banner:before {
content: url(http://w3c.org/2008/site/images/favicon.ico);
width: 1000px;
}
#Banner1:before {
content: url(http://w3c.org/2008/site/images/favicon.ico);
width: 1000px;
}