Basic Setup

.gitignore

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+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+.pnpm-debug.log*
+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+*.lcov
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# Snowpack dependency directory (https://snowpack.dev/)
+web_modules/
+
+# TypeScript cache
+*.tsbuildinfo
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional stylelint cache
+.stylelintcache
+
+# Microbundle cache
+.rpt2_cache/
+.rts2_cache_cjs/
+.rts2_cache_es/
+.rts2_cache_umd/
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variable files
+.env
+.env.development.local
+.env.test.local
+.env.production.local
+.env.local
+
+# parcel-bundler cache (https://parceljs.org/)
+.cache
+.parcel-cache
+
+# Next.js build output
+.next
+out
+
+# Nuxt.js build / generate output
+.nuxt
+dist
+
+# Gatsby files
+.cache/
+# Comment in the public line in if your project uses Gatsby and not Next.js
+# https://nextjs.org/blog/next-9-1#public-directory-support
+# public
+
+# vuepress build output
+.vuepress/dist
+
+# vuepress v2.x temp and cache directory
+.temp
+.cache
+
+# Docusaurus cache and generated files
+.docusaurus
+
+# Serverless directories
+.serverless/
+
+# FuseBox cache
+.fusebox/
+
+# DynamoDB Local files
+.dynamodb/
+
+# TernJS port file
+.tern-port
+
+# Stores VSCode versions used for testing VSCode extensions
+.vscode-test
+
+# yarn v2
+.yarn/cache
+.yarn/unplugged
+.yarn/build-state.yml
+.yarn/install-state.gz
+.pnp.*

babel.config.json

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+{
+    "presets": ["@babel/preset-env"],
+    "plugins": [
+        ["@babel/plugin-transform-react-jsx", {
+            "pragma": "h",
+            "pragmaFrag": "Fragment"
+        }]
+    ],
+
+}

package.json

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+{
+  "name": "webapp",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "@babel/preset-react": "^7.24.6",
+    "babel": "^6.23.0",
+    "materialize-css": "^1.0.0-rc.2",
+    "preact": "^10.22.0",
+    "webpack": "^5.91.0"
+  },
+  "devDependencies": {
+    "@babel/core": "^7.24.6",
+    "@babel/plugin-transform-react-jsx": "^7.24.6",
+    "@babel/preset-env": "^7.24.6",
+    "babel-loader": "^9.1.3"
+  }
+}

src/main.js

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+import {h, render, Component} from 'preact'
+
+class Clock extends Component {
+    state = { time: Date.now() };
+
+    componentDidMount(){
+        this.timer = setInterval(() => {
+            this.setState({ time: Date.now() });
+        }, 1000);
+    }
+
+    componentWillUnmount() {
+        clearInterval(this.timer);
+    }
+
+    render() {
+        let time = new Date(this.state.time).toLocaleTimeString();
+        return <span> {time} </span>
+    }
+}
+
+render(<Clock />, document.getElementById("app"));

webpack.config.js

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+const path = require('path')
+
+module.exports = {
+    entry: './src/main.js',
+    mode: 'development',
+    output: { 
+        path: path.resolve(__dirname, 'dist'),
+        filename: 'myapp.bundle.js',
+    },
+    resolve: {
+        alias: {
+            "react": "preact/compat",
+            "react-dom/test-utils": "preact/test-utils",
+            "react-dom": "preact/compat",
+            "react/jsx-runtime": "preact/jsx-runtime"
+        }
+    },
+    module: {
+        rules: [
+            {
+                test: /\.m?js$/,
+                exclude: /node_modules/,
+                use: {
+                    loader: "babel-loader",
+                    options: {
+                        presets:["@babel/preset-env"]
+                    }
+                }
+            }
+        ]},
+//    plugins: [
+//             ['@babel/plugin-transform-react-jsx', {
+//                pragma: 'h',
+//                pragmaFrag: 'Fragment',
+//              }],
+//    ]
+};