Femtality- -v0.16.1- — By Aerisetta

<div id="count">0</div> <button id="inc">+1</button> Behavior: state is shallow, synchronous, and cheap. Effects run after state updates. Use transitions to animate numeric state from A to B.

import { state, transition } from 'femtality';

Example: focus-pulse behavior

function focusPulse() { const active = state(false); const pulse = transition(active, { duration: 800, loop: true }); return { attach(el) { el.addEventListener('focus', () => active.value = true); el.addEventListener('blur', () => active.value = false); // bind a CSS variable for use in styles bindStyle(el, () => ({ '--pulse': active.value ? '1' : '0' })); } }; }

React example (hooks wrapper):

function useFemtState(initial) { const s = state(initial); useEffect(() => () => s.destroy && s.destroy(), []); return s; }

const progress = state(0);

import { useEffect } from 'react'; import { state } from 'femtality';