JSFiddle - React, Tailwind, and code Playground

HTML

<ol class="custom">
    <li>mumbo jumbo</li>
    <li>blah blah</li>
    <li>something something</li>
</ol>

CSS

.custom {
    counter-reset: foo;
}
.custom li {
    list-style-type: none;
}
.custom li::before {
    counter-increment: foo;
    content:"1.1." counter(foo)" ";
}