Femtality- -v0.16.1- By Aerisetta -

input { box-shadow: 0 0 calc(6px * var(--pulse)) rgba(220,20,60,0.45); transition: box-shadow 200ms; } FEMTALITY is framework-light: you can use its states inside React, Vue, Svelte, or plain DOM.

import { behavior } from 'femtality';

import { useEffect } from 'react'; import { state } from 'femtality'; FEMTALITY- -v0.16.1- By Aerisetta

const count = state(0);

// bindStyle sets inline style properties reactively bindStyle(document.querySelector('.bar'), t => ({ width: `${progress.value}%` })); input { box-shadow: 0 0 calc(6px * var(--pulse))

Example: focus-pulse behavior