rerender-defer-reads

Don't subscribe to dynamic state (searchParams, localStorage) if you only read it inside callbacks.

Skills
Web development
0

What it does and how to use it

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

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

Install (Claude Code)

mkdir -p .claude/skills/rerender-defer-reads && curl -fsSL https://doutorai.pt/data/lib/skills__rerender-defer-reads.md -o .claude/skills/rerender-defer-reads/SKILL.md

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

Content

---
title: Defer State Reads to Usage Point
impact: MEDIUM
impactDescription: avoids unnecessary subscriptions
tags: rerender, searchParams, localStorage, optimization
---

## Defer State Reads to Usage Point

Don't subscribe to dynamic state (searchParams, localStorage) if you only read it inside callbacks.

**Incorrect (subscribes to all searchParams changes):**

```tsx
function ShareButton({ chatId }: { chatId: string }) {
  const searchParams = useSearchParams()

  const handleShare = () => {
    const ref = searchParams.get('ref')
    shareChat(chatId, { ref })
  }

  return <button onCli

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