Tudor/react example (#551)

* react example

---------

Co-authored-by: tudor <[email protected]>
Co-authored-by: Sam Willis <[email protected]>

examples/react/.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?

examples/react/README.md

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+# Example: PGlite + Vite + React + TypeScript
+
+This is an example of a simple project using [PGlite](https://pglite.dev) and it's [React integration](https://pglite.dev/docs/framework-hooks/react). It uses [Vite](https://vite.dev), [React](https://react.dev/) and [TypeScript](https://www.typescriptlang.org/).
+
+This example demonstrates the usage of some of PGlite's React API: [PGliteProvider](https://pglite.dev/docs/framework-hooks/react#pgliteprovider), [usePGlite](https://pglite.dev/docs/framework-hooks/react#usepglite), [useLiveQuery](https://pglite.dev/docs/framework-hooks/react#uselivequery).
+
+On page load, a database is created with a single table. On pressing the button, a new row is inserted into the database. The `useLiveQuery` will watch for any changes and display the most recently inserted 5 rows.
+
+# Getting started with this example
+
+## Prerequisites
+You need [node](https://nodejs.org/en/download) (at least version 18), [pnpm](https://pnpm.io/installation) and [git](https://git-scm.com/downloads) installed.
+
+Check node version
+```
+$ node --version
+```
+Sample output: `v20.9.0`
+
+Check pnpm version
+```
+$ pnpm --version
+```
+Sample output: `9.15.3`
+
+Check git version
+```
+$ git --version
+```
+Sample output: `git version 2.34.1`
+
+## Install and run the example locally
+
+This example depends on `PGlite` packages released on npmjs.com, so you don't need to build the entire `PGlite` project in order to run the example.
+
+1. Get the code from GitHub. The example is in `PGlite`'s main repository
+```
+$ git clone https://github.com/electric-sql/pglite
+```
+2. Navigate to this example's directory
+```
+$ cd ./pglite/examples/react
+```
+3. Install dependencies
+
+```
+$ pnpm i --ignore-workspace
+```
+
+This example is part of the `pglite` pnpm workspace, but for our needs, we do not need to install all dependencies in the workspace. Thus passing the `--ignore-workspace` flag.
+
+4. Start a development server locally
+```
+$ pnpm dev
+```
+Sample output:
+```
+  VITE v6.1.0  ready in 126 ms
+
+  ➜  Local:   http://localhost:5173/
+  ➜  Network: use --host to expose
+  ➜  press h + enter to show help
+```
+
+5. Open your browser and point to the above indicated address (http://localhost:5173/ but your address might be different)
+
+# Getting started with PGlite + Vite + React + Typescript
+
+If you'd like to start from scratch, here is how you can reproduce this example, so you understand better how it was made:
+
+1. Install [node](https://nodejs.org/en/download), [pnpm](https://pnpm.io/installation) and [git](https://git-scm.com/downloads)
+2. Run `pnpm create vite`. Follow the steps, input the name of your project (eg pglite-vite-react-project), selecte `React` for framework, `TypeScript` as variant. 
+
+Sample output:
+
+```
+$ pnpm create vite
+.../19522a4053e-20b11                    |   +1 +
+.../19522a4053e-20b11                    | Progress: resolved 1, reused 1, downloaded 0, added 1, done
+✔ Project name: … pglite-vite-react-project
+✔ Select a framework: › React
+✔ Select a variant: › TypeScript
+
+Scaffolding project in /tmp/pglite-vite-react-project...
+
+Done. Now run:
+
+  cd pglite-vite-react-project
+  pnpm install
+  pnpm run dev
+```
+
+3. Run the steps above:
+
+```
+  $ cd pglite-vite-react-project
+  $ pnpm install
+  $ pnpm run dev
+
+```
+
+4. The last command will start an http server on your local machine. Point your browser to the indicated address:
+
+```
+$ pnpm run dev
+  VITE v6.1.0  ready in 126 ms
+
+  ➜  Local:   http://localhost:5173/
+  ➜  Network: use --host to expose
+  ➜  press h + enter to show help
+```
+
+4. Install [@electric-sql/pglite](https://www.npmjs.com/package/@electric-sql/pglite) and [@electric-sql/pglite-react](https://www.npmjs.com/package/@electric-sql/pglite-react) npm packages:
+
+```
+$ pnpm install @electric-sql/pglite @electric-sql/pglite-react
+
+Packages: +2
+++
+Downloading @electric-sql/[email protected]: 9.99 MB/9.99 MB, done
+Progress: resolved 224, reused 180, downloaded 2, added 2, done
+
+dependencies:
++ @electric-sql/pglite 0.2.17
++ @electric-sql/pglite-react 0.2.17
+
+```
+
+5. You are ready start using PGlite's React API.
+Make sure to exclude pglite from dependency optimization using the [optimizeDeps option inside vite.config.js](https://pglite.dev/docs/bundler-support#vite).
+
+6. Have a look at this project's `App.tsx`, `MyPGliteComponent.tsx` and `MyPGliteItemsComponent.tsx` to see how you can create a database and use PGlite React's integration and start modifying your project. Switch to the browser to see your changes.
+
+

examples/react/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 tseslint from 'typescript-eslint'
+
+export default tseslint.config(
+  { ignores: ['dist'] },
+  {
+    extends: [js.configs.recommended, ...tseslint.configs.recommended],
+    files: ['**/*.{ts,tsx}'],
+    languageOptions: {
+      ecmaVersion: 2020,
+      globals: globals.browser,
+    },
+    plugins: {
+      'react-hooks': reactHooks,
+      'react-refresh': reactRefresh,
+    },
+    rules: {
+      ...reactHooks.configs.recommended.rules,
+      'react-refresh/only-export-components': [
+        'warn',
+        { allowConstantExport: true },
+      ],
+    },
+  },
+)

examples/react/index.html

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+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <link rel="icon" type="image/svg+xml" href="/pglite.svg" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>PGlite with Vite + React + TS</title>
+  </head>
+  <body>
+    <div id="root"></div>
+    <script type="module" src="/src/main.tsx"></script>
+  </body>
+</html>

examples/react/package.json

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+{
+  "name": "pglite-react",
+  "author": "Electric DB Limited",
+  "homepage": "https://pglite.dev",
+  "license": "Apache-2.0",
+  "private": false,
+  "version": "0.0.1",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "tsc -b && vite build",
+    "lint": "eslint .",
+    "preview": "vite preview"
+  },
+  "dependencies": {
+    "@electric-sql/pglite": "^0.2.17",
+    "@electric-sql/pglite-react": "^0.2.17",
+    "react": "^19.0.0",
+    "react-dom": "^19.0.0"
+  },
+  "devDependencies": {
+    "@eslint/js": "^9.19.0",
+    "@types/react": "^19.0.2",
+    "@types/react-dom": "^19.0.2",
+    "@vitejs/plugin-react": "^4.3.2",
+    "eslint": "^8.57.1",
+    "eslint-plugin-react-hooks": "^4.6.2",
+    "eslint-plugin-react-refresh": "^0.4.12",
+    "globals": "^15.11.0",
+    "typescript": "^5.6.3",
+    "typescript-eslint": "^8.22.0",
+    "vite": "^5.4.8"
+  }
+}