JSFiddle - React, Tailwind, and code Playground

by swfour

HTML

<ol>
    <li>Number One</li>
    <li>Number Two</li>
    <li>Number Three</li>
</ol>
<ol>
    <li data-prefix="1">Number Ten</li>
    <li data-prefix="1">Number Eleven</li>
    <li data-prefix="1">Number Twelve</li>
</ol>
<ol>
    <li data-prefix="a">Number Ten</li>
    <li data-prefix="b">Number Eleven</li>
    <li data-prefix="c">Number Twelve</li>
</ol>

CSS

ol {
    list-style-type: none;
    counter-reset: lis;
}
li {
    counter-increment: lis
}
li:before {
    content: attr(data-prefix) counter(lis)". ";
    color: red;
}