Simple event driven store based on Proxy

store.js

/**
 * Usage example
 *
 * ```
 * const myStore = new Store({
 *   count: 1,
 * });
 *
 * myStore.addEventListener('change', () => {
 *   console.log(store.state.count);
 * });
 *
 * myStore.state.count++;
 * ```
 */

class Store extends EventTarget {
  constructor(state = {}) {
    super();
    this.state = new Proxy(state, {
      set: (...args) => {
        try {
          return Reflect.set(...args);
        } catch {
          return false;
        } finally {
          this.dispatchEvent(new Event('change'));
        }
      },
    });
  }
}