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Chapter05 #13

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7dab4c8
update dependencies in package-lock.json to latest versions
rlobenwein Sep 27, 2025
51c0365
Create bad example for useEffect hook.
rlobenwein Sep 27, 2025
f4b4749
Add Context API example
rlobenwein Sep 27, 2025
65bbfae
Add useMemo example with expensive calculation
rlobenwein Sep 27, 2025
9792ab1
Add useRef example
rlobenwein Sep 27, 2025
73878d3
Add more event handlers examples
rlobenwein Oct 4, 2025
c86289d
feat: add event propagation example
rlobenwein Oct 4, 2025
dab2b39
Delete Event pooling example since it was removed in React 17.
rlobenwein Oct 4, 2025
bcee351
Add .gitignore to repo root and remove node_modules folder from
rlobenwein Oct 18, 2025
2e3f34b
Swap MyFeature.jsx files between 3-article-item-component and 4-add-a…
rlobenwein Oct 18, 2025
9a3ad93
Add example of render props with variables
rlobenwein Oct 18, 2025
daa5cb3
Add an example of reusing components
rlobenwein Oct 18, 2025
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24 changes: 24 additions & 0 deletions Chapter03/10-usememo-expensive-calculation/.gitignore
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# Logs
logs
*.log
npm-debug.log*
yarn-debug.log*
yarn-error.log*
pnpm-debug.log*
lerna-debug.log*

node_modules
dist
dist-ssr
*.local

# Editor directories and files
.vscode/*
!.vscode/extensions.json
.idea
.DS_Store
*.suo
*.ntvs*
*.njsproj
*.sln
*.sw?
16 changes: 16 additions & 0 deletions Chapter03/10-usememo-expensive-calculation/README.md
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# React + Vite

This template provides a minimal setup to get React working in Vite with HMR and some ESLint rules.

Currently, two official plugins are available:

- [@vitejs/plugin-react](https://github.com/vitejs/vite-plugin-react/blob/main/packages/plugin-react) uses [Babel](https://babeljs.io/) for Fast Refresh
- [@vitejs/plugin-react-swc](https://github.com/vitejs/vite-plugin-react/blob/main/packages/plugin-react-swc) uses [SWC](https://swc.rs/) for Fast Refresh

## React Compiler

The React Compiler is not enabled on this template. To add it, see [this documentation](https://react.dev/learn/react-compiler/installation).

## Expanding the ESLint configuration

If you are developing a production application, we recommend using TypeScript with type-aware lint rules enabled. Check out the [TS template](https://github.com/vitejs/vite/tree/main/packages/create-vite/template-react-ts) for information on how to integrate TypeScript and [`typescript-eslint`](https://typescript-eslint.io) in your project.
29 changes: 29 additions & 0 deletions Chapter03/10-usememo-expensive-calculation/eslint.config.js
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import js from '@eslint/js'
import globals from 'globals'
import reactHooks from 'eslint-plugin-react-hooks'
import reactRefresh from 'eslint-plugin-react-refresh'
import { defineConfig, globalIgnores } from 'eslint/config'

export default defineConfig([
globalIgnores(['dist']),
{
files: ['**/*.{js,jsx}'],
extends: [
js.configs.recommended,
reactHooks.configs['recommended-latest'],
reactRefresh.configs.vite,
],
languageOptions: {
ecmaVersion: 2020,
globals: globals.browser,
parserOptions: {
ecmaVersion: 'latest',
ecmaFeatures: { jsx: true },
sourceType: 'module',
},
},
rules: {
'no-unused-vars': ['error', { varsIgnorePattern: '^[A-Z_]' }],
},
},
])
13 changes: 13 additions & 0 deletions Chapter03/10-usememo-expensive-calculation/index.html
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<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<link rel="icon" type="image/svg+xml" href="/vite.svg" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>10-usememo-expensive-calculation</title>
</head>
<body>
<div id="root"></div>
<script type="module" src="/src/main.jsx"></script>
</body>
</html>
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