valtio-reactive/dist/computed.js

valtio-reactive makes Valtio a reactive library

import { proxy } from 'valtio/vanilla';
import { watch } from './core.js';
export function computed(obj) {
    const computedState = proxy({});
    for (const key in obj) {
        watch(() => {
            computedState[key] = obj[key]();
        });
    }
    return computedState;
}