JSFiddle - React, Tailwind, and code Playground

HTML

<img info="hey guys" src="http://i024.radikal.ru/1211/4c/809c7c2dfa74.jpg">
<div info="I'm working, but I'm inside the block"></div>

CSS

div {
    height: 100px;
    margin: 10px;
    background: yellow;
}
div[info]::after, img[info]::after {
    content: attr(info);
    display: block;
    margin: 3px;
    color: black;
    font-style: italic;
}