# rerender-functional-setstate

> When updating state based on the current state value, use the functional update form of setState instead of directly referencing the state variable. This p

- Source: https://doutorai.pt/en/components/skills__rerender-functional-setstate
- Type: Skills
- Category: Development
- Downloads: 0
- Site: Doutor AI (https://doutorai.pt/en) - AI tools for small businesses

An open-source community component, curated and adapted by Doutor AI.

## What it does and how to use it

A **skill** that teaches Claude Code to do development tasks well. It is packaged knowledge the model uses whenever it is relevant.

1. Install the skill (command above).
2. In Claude Code, describe what you need - the skill turns on by itself when the context fits.
3. No commands to memorize: you talk in plain language and the skill does the rest.

## Install (Claude Code)

```bash
mkdir -p .claude/skills/rerender-functional-setstate && curl -fsSL https://doutorai.pt/data/lib/skills__rerender-functional-setstate.md -o .claude/skills/rerender-functional-setstate/SKILL.md
```

Paste this command into the terminal, in your project folder, and the component installs automatically.

## Content

````
---
title: Use Functional setState Updates
impact: MEDIUM
impactDescription: prevents stale closures and unnecessary callback recreations
tags: react, hooks, useState, useCallback, callbacks, closures
---

## Use Functional setState Updates

When updating state based on the current state value, use the functional update form of setState instead of directly referencing the state variable. This prevents stale closures, eliminates unnecessary dependencies, and creates stable callback references.

**Incorrect (requires state as dependency):**

```tsx
function TodoList() {
  const [items, setItems]

- 🔒 Full content on the Pro plan (€7.99/month) -
````

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Content by Doutor AI (https://doutorai.pt/en). When quoting, please cite the source: https://doutorai.pt/en/components/skills__rerender-functional-setstate