Hex symbols in a data attribute

by kazu69

HTML

<div data-foo='First line &#xa; Second Line'>foo</div>
 see: https://www.w3.org/TR/CSS2/generate.html#content

CSS

[data-foo]:after {
    content: attr(data-foo);
    background-color: black;
    color: white;
    white-space: pre;
    display: inline-block;
}