Valtio Has a Free API That Most Developers Dont Know About

Valtio makes proxy-based state management simple. Mutate state directly — React auto re-renders.

Usage

import { proxy, useSnapshot } from "valtio";

const state = proxy({ count: 0, todos: [] });
state.count++; // mutate directly
state.todos.push("item");

function Counter() {
  const snap = useSnapshot(state);
  return <button onClick={() => state.count++}>{snap.count}</button>;
}

Derived

import { derive } from "valtio/utils";
const derived = derive({ doubled: (get) => get(state).count * 2 });

Key Features

• Mutable API
• Proxy-based reactivity
• Derived state
• Tiny bundle (3KB)

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