---
title: "React 18 Automatic Batching Patterns - Air Market"
description: "After moving to React 18, a class component's state updates behave differently than before and something broke. This gives exact patterns for diagnosing and fixing that, plus a decision tree for whet…"
canonical: "https://airmarket.ai/app/react18-batching-patterns"
---

[Air Market](/) / [Developer Tools](/category/devtools) / React 18 Automatic Batching Patterns

Skill by [GitHub](/@github)

# React 18 Automatic Batching Patterns

Before you reach for flushSync, check whether you need it

## What this does

After moving to React 18, a class component's state updates behave differently than before and something broke. This gives exact patterns for diagnosing and fixing that, plus a decision tree for whether the escape hatch is really needed. Read it before adding one, and when upgrade-related test failures appear.

### Top 3 things it does for you

- Fix state updates that changed behavior after the React 18 upgrade
- Decide whether a flushSync call is actually warranted
- Sort out multiple setState calls in an async method

## Information

**React 18 Automatic Batching Patterns at a glance**

|  |  |
| --- | --- |
| Kind | Skill |
| Publisher | [GitHub](/@github) |
| Category | [Developer Tools](/category/devtools) |
| Works with | Agent Skills - an open standard supported by 40+ agents |
| Size | 11 KB |
| Licence | MIT |
| Repository | [github/awesome-copilot](https://github.com/github/awesome-copilot/tree/90921cc46f4e452ea379e70884d60ec25263f16a/skills/react18-batching-patterns) |
| GitHub stars | 38,187 (as of Nov 2026) |
| Installs | 756, counted by skills.sh (Nov 2026) |

## Security report

**Verified.** AIR scanned this exact version of React 18 Automatic Batching Patterns and flagged nothing. AIR's verdict: **safe**.

**What React 18 Automatic Batching Patterns's check was run against**

|  |  |
| --- | --- |
| Commit | 90921cc46f4e452ea379e70884d60ec25263f16a |
| Content hash | 345cf37f061e9401c31d9a53aa888021abcf7b00695dbba3da045a0ecd39df5e |
| Files read | [Browse the files at this exact commit](https://github.com/github/awesome-copilot/blob/90921cc46f4e452ea379e70884d60ec25263f16a/skills/react18-batching-patterns/SKILL.md) |

A scan is named by the exact content it read, not by a version number. A different version is a different artifact, and nothing here applies to a version AIR has not scanned.

[Read the full security report for React 18 Automatic Batching Patterns](/security/react18-batching-patterns)

## About React 18 Automatic Batching Patterns

This provides exact patterns for diagnosing and fixing automatic batching regressions in React 18 class components. The situations it names are multiple setState calls in an async method, inside setTimeout, inside a Promise .then() or .catch(), or in a native event handler.

It is meant to be read before writing any flushSync call - the decision tree it carries is there to prevent unnecessary flushSync overuse.

It also covers test failures caused by intermediate state assertions that break after a React 18 upgrade.

## What's inside

- SKILL.md - instructions
- references/batching-categories.md - reference
- references/flushSync-guide.md - reference

## Questions

### Is React 18 Automatic Batching Patterns safe to install?

AIR scanned this exact version of React 18 Automatic Batching Patterns and flagged nothing. AIR's verdict: safe. The verdict is named by the content that was read, at commit 90921cc46f4e, so it cannot drift onto a version nobody scanned. The full report is at https://airmarket.ai/security/react18-batching-patterns.

### How do I install React 18 Automatic Batching Patterns?

Open https://airmarket.ai/app/react18-batching-patterns on Air Market and use the install action: Air Market hands Claude a prompt naming this exact skill, and Claude sets it up. Source, pinned to the exact commit this listing describes: https://github.com/github/awesome-copilot/tree/90921cc46f4e452ea379e70884d60ec25263f16a/skills/react18-batching-patterns. Install from that link, not the branch.

## Related on Air Market

- [More Developer Tools listings](/category/devtools)
- [Everything by GitHub](/@github)

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Canonical URL: <https://airmarket.ai/app/react18-batching-patterns>