reactive-box simple counter

const { box, sel, expr } = require("reactive-box"); const [getCounter, setCounter] = box(0); const [getNext] = sel(() => getCounter() + 1); const increment = () => setCounter(getCounter() + 1); const [run] = expr(() => { console.log(`Counter: ${getCounter()} (next value: ${getNext()})`) }); run(); increment();