Position tooltips and popovers with native CSS — zero runtime JS

Repo: https://github.com/mk668a/css-anchor-kit · MIT.

css-anchor-kit is floating-ui's React API with the JavaScript runtime deleted — positioning happens in the browser's layout engine, not in a requestAnimationFrame loop.

Here's a tooltip. The whole thing:

import { useAnchor } from 'css-anchor-kit'

function Tooltip() {