05_react/unterricht/tag41/01_components-with-hooks/src/App.jsx

@@ -4,7 +4,11 @@
 // import InputAmount from './components/inputs/InputAmount';
 // import FormNewsletter from './components/forms/FormNewsletter';
 
+import ExampleUseContext from './components/examples/ExampleUseContext';
+import ExampleUseId from './components/examples/ExampleUseId';
+import ExampleUseReducer from './components/examples/ExampleUseReducer';
 import ExampleUseState from './components/examples/ExampleUseState';
+import ThemeProvider from './components/examples/theme-switcher/ThemeProvider';
 import InputAmount from './components/inputs/InputAmount';
 
 function App(props) {
@@ -27,6 +31,21 @@ function App(props) {
             </ul>
           </div>
           <hr />
+          <h2>Example useId Hook (seit 2022)</h2>
+          <ExampleUseId />
+          <ExampleUseId />
+          <ExampleUseId />
+          <hr />
+          <h2>Example useContext Hook</h2>
+          <ThemeProvider>
+            <ExampleUseContext />
+            <hr />
+            <ExampleUseContext />
+          </ThemeProvider>
+          <hr />
+          <h2>Example useReducer Hook</h2>
+          <ExampleUseReducer />
+          <hr />
           <h2>Example useState Hook</h2>
           <ExampleUseState />
         </div>

05_react/unterricht/tag41/01_components-with-hooks/src/components/examples/ExampleUseContext.jsx

@@ -0,0 +1,18 @@
+import { useContext } from 'react';
+import ThemeContext from './theme-switcher/ThemeContext';
+
+const ExampleUseContext = (props) => {
+  // const {  } = props;
+
+  const theme = useContext(ThemeContext);
+
+  return (
+    <div className={`example-use-context ${theme === 'light' ? 'text-bg-light' : 'text-bg-dark'} p-3`}>
+      <h4>useContext</h4>
+      <p>
+        The theme of this component is: <strong>{theme}</strong>
+      </p>
+    </div>
+  );
+};
+export default ExampleUseContext;

05_react/unterricht/tag41/01_components-with-hooks/src/components/examples/ExampleUseId.jsx

@@ -0,0 +1,24 @@
+import { useId } from 'react';
+// import { v4 as uuidv4 } from 'uuid';
+
+const ExampleUseId = (props) => {
+  // const { } = props;
+  const id = useId().replaceAll(/[_r.]/g, '');
+  // const id2 = uuidv4(); // -> 'b18794e8-5d0d-417c-b361-ba38e78411b4'
+
+  return (
+    <div className="example-use-id">
+      <p>
+        <strong>ID: {id}</strong>
+      </p>
+
+      <div className="mb-3">
+        <label htmlFor={`input-date-${id}`} className="form-label">
+          Datum:
+        </label>
+        <input type="date" name="date" id={`input-date-${id}`} className="form-control w-25" />
+      </div>
+    </div>
+  );
+};
+export default ExampleUseId;

05_react/unterricht/tag41/01_components-with-hooks/src/components/examples/ExampleUseReducer.jsx

@@ -0,0 +1,77 @@
+import { useReducer } from 'react';
+import { FaMinus, FaPlus } from 'react-icons/fa6';
+
+const initialState = {
+  counter: 0,
+  //more props...
+};
+
+// Reducer Funktion verwaltet das state Objekt. Über die Funktion lässt sich das state-Objekt gezielt verändern
+function reducer(state, action) {
+  // action Objekt hat immer folgende Eigenschaften: {type: 'ACTION_NAME', payload: changeValue}
+  const { type, payload = 1 } = action;
+  switch (type) {
+    case 'INCREASE':
+      return { counter: state.counter + 1 };
+    case 'DECREASE':
+      return { counter: state.counter - 1 };
+    case 'DOUBLE':
+      return { counter: state.counter * 2 };
+    case 'INC_VALUE':
+      return { counter: state.counter + payload };
+
+    default:
+      console.warn('Action Type not found');
+      return state;
+  }
+}
+
+const ExampleUseReducer = (props) => {
+  // const { } = props;
+
+  // Hook - Toplevel
+  // const [counter, setCounter] = useState(0);
+
+  const [state, dispatch] = useReducer(reducer, initialState);
+
+  // EventHandler ============
+  const handeClickInc = (e) => {
+    //setCounter(counter + 1);
+    dispatch({ type: 'INCREASE' });
+  };
+  const handeClickDec = (e) => {
+    // setCounter(counter - 1);
+
+    // dispatch(action_object)
+    dispatch({ type: 'DECREASE' });
+  };
+
+  const handleClickDouble = (e) => {
+    // dispatch(action_object)
+    dispatch({ type: 'DOUBLE' });
+  };
+
+  const handleClickIncValue = (e) => {
+    dispatch({ type: 'INC_VALUE', payload: 5 });
+  };
+
+  return (
+    <div className="example-use-reducer">
+      Counter: {state.counter}
+      <button className="btn btn-dark button-inc mx-1" aria-label="Increase" onClick={handeClickInc}>
+        <FaPlus />
+      </button>
+      <button className="btn btn-dark button-dec mx-1" aria-label="Decrease" onClick={handeClickDec}>
+        <FaMinus />
+      </button>
+      <button className="btn btn-dark button-double mx-1" aria-label="Double" onClick={handleClickDouble}>
+        <FaPlus />
+        <FaPlus />
+      </button>
+      <button className="btn btn-dark button-inc-value mx-1" aria-label="Inc by value" onClick={handleClickIncValue}>
+        <FaPlus /> 5
+      </button>
+    </div>
+  );
+};
+export default ExampleUseReducer;

05_react/unterricht/tag41/01_components-with-hooks/src/components/examples/theme-switcher/ThemeContext.jsx

@@ -0,0 +1,7 @@
+import { createContext } from 'react';
+
+export const THEME_DEFAULT_VALUE = 'light';
+const ThemeContext = createContext(THEME_DEFAULT_VALUE); // standard theme is light;
+// ThemeContext wird durch createContext() zu einem JSX-Element
+
+export default ThemeContext;

05_react/unterricht/tag41/01_components-with-hooks/src/components/examples/theme-switcher/ThemeProvider.jsx

@@ -0,0 +1,26 @@
+import { useState } from 'react';
+import ThemeContext, { THEME_DEFAULT_VALUE } from './ThemeContext';
+
+const ThemeProvider = (props) => {
+  const { children } = props;
+
+  console.log(ThemeContext._currentValue); // 'light' <- _currentValue beinhaltet initialWert. Soll aber in production Umgebung nicht verwendet werden, da kein offizieller Standard.
+
+  const [theme, setTheme] = useState(THEME_DEFAULT_VALUE);
+
+  // EventHandler ==============
+  const handleToggleTheme = () => {
+    console.log('click');
+    setTheme((prevState) => (prevState === 'light' ? 'dark' : 'light'));
+  };
+
+  return (
+    <ThemeContext.Provider value={theme}>
+      <button className="btn btn-dark button-theme-toggle my-3" onClick={handleToggleTheme}>
+        Change Theme
+      </button>
+      {children}
+    </ThemeContext.Provider>
+  );
+};
+export default ThemeProvider;

05_react/unterricht/tag41/02_react-router-simple/.gitignore

@@ -0,0 +1,24 @@
+# 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?

05_react/unterricht/tag41/02_react-router-simple/.oxlintrc.json

@@ -0,0 +1,8 @@
+{
+  "$schema": "./node_modules/oxlint/configuration_schema.json",
+  "plugins": ["react", "oxc"],
+  "rules": {
+    "react/rules-of-hooks": "error",
+    "react/only-export-components": ["warn", { "allowConstantExport": true }]
+  }
+}

05_react/unterricht/tag41/02_react-router-simple/README.md

@@ -0,0 +1,16 @@
+# React + Vite
+
+This template provides a minimal setup to get React working in Vite with HMR and some Oxlint rules.
+
+Currently, two official plugins are available:
+
+- [@vitejs/plugin-react](https://github.com/vitejs/vite-plugin-react/blob/main/packages/plugin-react) uses [Oxc](https://oxc.rs)
+- [@vitejs/plugin-react-swc](https://github.com/vitejs/vite-plugin-react/blob/main/packages/plugin-react-swc) uses [SWC](https://swc.rs/)
+
+## React Compiler
+
+The React Compiler is not enabled on this template because of its impact on dev & build performances. To add it, see [this documentation](https://react.dev/learn/react-compiler/installation).
+
+## Expanding the Oxlint 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 Oxlint's TypeScript related rules in your project.

05_react/unterricht/tag41/02_react-router-simple/index.html

@@ -0,0 +1,14 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <link rel="icon" type="image/svg+xml" href="/favicon.svg" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <!-- <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.8/dist/css/bootstrap.min.css" /> -->
+    <title>02_react-router-simple</title>
+  </head>
+  <body>
+    <div id="root"></div>
+    <script type="module" src="/src/main.jsx"></script>
+  </body>
+</html>

05_react/unterricht/tag41/02_react-router-simple/package.json

@@ -0,0 +1,27 @@
+{
+  "name": "02_react-router-simple",
+  "private": true,
+  "version": "0.0.0",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "vite build",
+    "lint": "oxlint",
+    "preview": "vite preview"
+  },
+  "dependencies": {
+    "bootstrap": "^5.3.8",
+    "react": "^19.2.8",
+    "react-dom": "^19.2.8",
+    "react-icons": "^5.7.0",
+    "react-router-dom": "^7.18.2"
+  },
+  "devDependencies": {
+    "@types/react": "^19.2.17",
+    "@types/react-dom": "^19.2.3",
+    "@vitejs/plugin-react": "^6.0.4",
+    "oxlint": "^1.75.0",
+    "sass-embedded": "^1.100.0",
+    "vite": "^8.2.0"
+  }
+}

05_react/unterricht/tag41/02_react-router-simple/public/icons.svg

@@ -0,0 +1,24 @@
+<svg xmlns="http://www.w3.org/2000/svg">
+  <symbol id="bluesky-icon" viewBox="0 0 16 17">
+    <g clip-path="url(#bluesky-clip)"><path fill="#08060d" d="M7.75 7.735c-.693-1.348-2.58-3.86-4.334-5.097-1.68-1.187-2.32-.981-2.74-.79C.188 2.065.1 2.812.1 3.251s.241 3.602.398 4.13c.52 1.744 2.367 2.333 4.07 2.145-2.495.37-4.71 1.278-1.805 4.512 3.196 3.309 4.38-.71 4.987-2.746.608 2.036 1.307 5.91 4.93 2.746 2.72-2.746.747-4.143-1.747-4.512 1.702.189 3.55-.4 4.07-2.145.156-.528.397-3.691.397-4.13s-.088-1.186-.575-1.406c-.42-.19-1.06-.395-2.741.79-1.755 1.24-3.64 3.752-4.334 5.099"/></g>
+    <defs><clipPath id="bluesky-clip"><path fill="#fff" d="M.1.85h15.3v15.3H.1z"/></clipPath></defs>
+  </symbol>
+  <symbol id="discord-icon" viewBox="0 0 20 19">
+    <path fill="#08060d" d="M16.224 3.768a14.5 14.5 0 0 0-3.67-1.153c-.158.286-.343.67-.47.976a13.5 13.5 0 0 0-4.067 0c-.128-.306-.317-.69-.476-.976A14.4 14.4 0 0 0 3.868 3.77C1.546 7.28.916 10.703 1.231 14.077a14.7 14.7 0 0 0 4.5 2.306q.545-.748.965-1.587a9.5 9.5 0 0 1-1.518-.74q.191-.14.372-.293c2.927 1.369 6.107 1.369 8.999 0q.183.152.372.294-.723.437-1.52.74.418.838.963 1.588a14.6 14.6 0 0 0 4.504-2.308c.37-3.911-.63-7.302-2.644-10.309m-9.13 8.234c-.878 0-1.599-.82-1.599-1.82 0-.998.705-1.82 1.6-1.82.894 0 1.614.82 1.599 1.82.001 1-.705 1.82-1.6 1.82m5.91 0c-.878 0-1.599-.82-1.599-1.82 0-.998.705-1.82 1.6-1.82.893 0 1.614.82 1.599 1.82 0 1-.706 1.82-1.6 1.82"/>
+  </symbol>
+  <symbol id="documentation-icon" viewBox="0 0 21 20">
+    <path fill="none" stroke="#aa3bff" stroke-linecap="round" stroke-linejoin="round" stroke-width="1.35" d="m15.5 13.333 1.533 1.322c.645.555.967.833.967 1.178s-.322.623-.967 1.179L15.5 18.333m-3.333-5-1.534 1.322c-.644.555-.966.833-.966 1.178s.322.623.966 1.179l1.534 1.321"/>
+    <path fill="none" stroke="#aa3bff" stroke-linecap="round" stroke-linejoin="round" stroke-width="1.35" d="M17.167 10.836v-4.32c0-1.41 0-2.117-.224-2.68-.359-.906-1.118-1.621-2.08-1.96-.599-.21-1.349-.21-2.848-.21-2.623 0-3.935 0-4.983.369-1.684.591-3.013 1.842-3.641 3.428C3 6.449 3 7.684 3 10.154v2.122c0 2.558 0 3.838.706 4.726q.306.383.713.671c.76.536 1.79.64 3.581.66"/>
+    <path fill="none" stroke="#aa3bff" stroke-linecap="round" stroke-linejoin="round" stroke-width="1.35" d="M3 10a2.78 2.78 0 0 1 2.778-2.778c.555 0 1.209.097 1.748-.047.48-.129.854-.503.982-.982.145-.54.048-1.194.048-1.749a2.78 2.78 0 0 1 2.777-2.777"/>
+  </symbol>
+  <symbol id="github-icon" viewBox="0 0 19 19">
+    <path fill="#08060d" fill-rule="evenodd" d="M9.356 1.85C5.05 1.85 1.57 5.356 1.57 9.694a7.84 7.84 0 0 0 5.324 7.44c.387.079.528-.168.528-.376 0-.182-.013-.805-.013-1.454-2.165.467-2.616-.935-2.616-.935-.349-.91-.864-1.143-.864-1.143-.71-.48.051-.48.051-.48.787.051 1.2.805 1.2.805.695 1.194 1.817.857 2.268.649.064-.507.27-.857.49-1.052-1.728-.182-3.545-.857-3.545-3.87 0-.857.31-1.558.8-2.104-.078-.195-.349-1 .077-2.078 0 0 .657-.208 2.14.805a7.5 7.5 0 0 1 1.946-.26c.657 0 1.328.092 1.946.26 1.483-1.013 2.14-.805 2.14-.805.426 1.078.155 1.883.078 2.078.502.546.799 1.247.799 2.104 0 3.013-1.818 3.675-3.558 3.87.284.247.528.714.528 1.454 0 1.052-.012 1.896-.012 2.156 0 .208.142.455.528.377a7.84 7.84 0 0 0 5.324-7.441c.013-4.338-3.48-7.844-7.773-7.844" clip-rule="evenodd"/>
+  </symbol>
+  <symbol id="social-icon" viewBox="0 0 20 20">
+    <path fill="none" stroke="#aa3bff" stroke-linecap="round" stroke-linejoin="round" stroke-width="1.35" d="M12.5 6.667a4.167 4.167 0 1 0-8.334 0 4.167 4.167 0 0 0 8.334 0"/>
+    <path fill="none" stroke="#aa3bff" stroke-linecap="round" stroke-linejoin="round" stroke-width="1.35" d="M2.5 16.667a5.833 5.833 0 0 1 8.75-5.053m3.837.474.513 1.035c.07.144.257.282.414.309l.93.155c.596.1.736.536.307.965l-.723.73a.64.64 0 0 0-.152.531l.207.903c.164.715-.213.991-.84.618l-.872-.52a.63.63 0 0 0-.577 0l-.872.52c-.624.373-1.003.094-.84-.618l.207-.903a.64.64 0 0 0-.152-.532l-.723-.729c-.426-.43-.289-.864.306-.964l.93-.156a.64.64 0 0 0 .412-.31l.513-1.034c.28-.562.735-.562 1.012 0"/>
+  </symbol>
+  <symbol id="x-icon" viewBox="0 0 19 19">
+    <path fill="#08060d" fill-rule="evenodd" d="M1.893 1.98c.052.072 1.245 1.769 2.653 3.77l2.892 4.114c.183.261.333.48.333.486s-.068.089-.152.183l-.522.593-.765.867-3.597 4.087c-.375.426-.734.834-.798.905a1 1 0 0 0-.118.148c0 .01.236.017.664.017h.663l.729-.83c.4-.457.796-.906.879-.999a692 692 0 0 0 1.794-2.038c.034-.037.301-.34.594-.675l.551-.624.345-.392a7 7 0 0 1 .34-.374c.006 0 .93 1.306 2.052 2.903l2.084 2.965.045.063h2.275c1.87 0 2.273-.003 2.266-.021-.008-.02-1.098-1.572-3.894-5.547-2.013-2.862-2.28-3.246-2.273-3.266.008-.019.282-.332 2.085-2.38l2-2.274 1.567-1.782c.022-.028-.016-.03-.65-.03h-.674l-.3.342a871 871 0 0 1-1.782 2.025c-.067.075-.405.458-.75.852a100 100 0 0 1-.803.91c-.148.172-.299.344-.99 1.127-.304.343-.32.358-.345.327-.015-.019-.904-1.282-1.976-2.808L6.365 1.85H1.8zm1.782.91 8.078 11.294c.772 1.08 1.413 1.973 1.425 1.984.016.017.241.02 1.05.017l1.03-.004-2.694-3.766L7.796 5.75 5.722 2.852l-1.039-.004-1.039-.004z" clip-rule="evenodd"/>
+  </symbol>
+</svg>

05_react/unterricht/tag41/02_react-router-simple/src/App.jsx

@@ -0,0 +1,82 @@
+import { BrowserRouter, Routes, Route, Link } from 'react-router-dom';
+
+// Navbar Komponente
+const Navbar = () => {
+  return (
+    <nav className="navbar navbar-expand-lg bg-body-tertiary">
+      <div className="container-fluid">
+        <Link className="navbar-brand" to="/">
+          Navbar
+        </Link>
+        <button
+          className="navbar-toggler"
+          type="button"
+          data-bs-toggle="collapse"
+          data-bs-target="#navbarNav"
+          aria-controls="navbarNav"
+          aria-expanded="false"
+          aria-label="Toggle navigation">
+          <span className="navbar-toggler-icon"></span>
+        </button>
+        <div className="collapse navbar-collapse" id="navbarNav">
+          <ul className="navbar-nav">
+            <li className="nav-item">
+              <Link className="nav-link" to="/">
+                Home
+              </Link>
+            </li>
+            <li className="nav-item">
+              <Link className="nav-link" to="/about">
+                About
+              </Link>
+            </li>
+          </ul>
+        </div>
+      </div>
+    </nav>
+  );
+};
+
+// Page Komponenten
+const HomePage = () => {
+  return (
+    <div className="page-home container py-5">
+      <h2>Home</h2>
+      <p>
+        Lorem, ipsum dolor sit amet consectetur adipisicing elit. Nam debitis autem cupiditate, unde ad, eveniet
+        adipisci recusandae molestias architecto deserunt quae, aut sunt alias repellendus cumque asperiores facere
+        animi? Pariatur dolores, voluptatibus earum at nihil quo accusamus debi
+      </p>
+    </div>
+  );
+};
+
+const AboutPage = () => {
+  return (
+    <div className="page-about container py-5">
+      <h2>About</h2>
+      <p>
+        Lorem, ipsum dolor sit amet consectetur adipisicing elit. Nam debitis autem cupiditate, unde ad, eveniet
+        adipisci recusandae molestias architecto deserunt quae, aut sunt alias repellendus cumque asperiores facere
+        animi? Pariatur dolores, voluptatibus earum at nihil quo accusamus debi
+      </p>
+    </div>
+  );
+};
+
+function App(props) {
+  // const { } = props;
+
+  return (
+    <BrowserRouter>
+      <Navbar />
+      <main>
+        <Routes>
+          <Route path="/" element={<HomePage />} />
+          <Route path="/about" element={<AboutPage />} />
+        </Routes>
+      </main>
+    </BrowserRouter>
+  );
+}
+export default App;

05_react/unterricht/tag41/02_react-router-simple/src/assets/react.svg

@@ -0,0 +1 @@
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05_react/unterricht/tag41/02_react-router-simple/src/main.jsx

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+import { StrictMode } from 'react';
+import { createRoot } from 'react-dom/client';
+
+// import und bundle from node_modules/bootstrap/dist/css/bootstrap.min.cs
+import 'bootstrap/dist/css/bootstrap.min.css';
+
+import App from './App.jsx';
+
+createRoot(document.getElementById('root')).render(
+  <StrictMode>
+    <App />
+  </StrictMode>,
+);

05_react/unterricht/tag41/02_react-router-simple/vite.config.js

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+import { defineConfig } from 'vite'
+import react from '@vitejs/plugin-react'
+
+// https://vite.dev/config/
+export default defineConfig({
+  plugins: [react()],
+})