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react18-lifecycle-patterns

Name: react18-lifecycle-patterns
Author: github

github/awesome-copilot

Provides exact before/after migration patterns for the three unsafe class component lifecycle methods - componentWillMount, componentWillReceiveProps, and componentWillUpdate - targeting React 18.3.1. Use this skill whenever a class component needs its lifecycle methods migrated, when deciding between getDerivedStateFromProps vs componentDidUpdate, when adding getSnapshotBeforeUpdate, or when fixing React 18 UNSAFE_ lifecycle warnings. Always use this skill before writing any lifecycle migration code - do not guess the pattern from memory, the decision trees here prevent the most common migration mistakes.

743 次安装
4.1万星标
收录于 2026.04.09

安装命令

$ npx skills add https://github.com/github/awesome-copilot --skill react18-lifecycle-patterns

SKILL.md

React 18 Lifecycle Patterns

Reference for migrating the three unsafe class component lifecycle methods to React 18.3.1 compliant patterns.

Quick Decision Guide

Before migrating any lifecycle method, identify the semantic category of what the method does. Wrong category = wrong migration. The table below routes you to the correct reference file.

componentWillMount - what does it do?

What it does	Correct migration	Reference
Sets initial state (`this.setState(...)`)	Move to `constructor`	→ componentWillMount.md
Runs a side effect (fetch, subscription, DOM)	Move to `componentDidMount`	→ componentWillMount.md
Derives initial state from props	Move to `constructor` with props	→ componentWillMount.md

SKILL.md

React 18 Lifecycle Patterns

Quick Decision Guide

componentWillMount - what does it do?

componentWillReceiveProps - what does it do?

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