Upgrade tooling and refactor

.github/workflows/ci.yml

@@ -0,0 +1,20 @@
+name: CI
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: pnpm/action-setup@v4
+        with:
+          version: 10
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+          cache: 'pnpm'
+      - name: Install deps
+        run: pnpm install
+      - name: Lint + typecheck + build + test
+        run: pnpm lint && pnpm check && pnpm build && pnpm test

.gitignore

@@ -8,3 +8,8 @@ node_modules
 !.env.example
 vite.config.js.timestamp-*
 vite.config.ts.timestamp-*
+test-results/
+.netlify
+repomix.config.json
+.repomixignore
+repomix-output.xml

.husky/pre-commit

@@ -0,0 +1 @@
+pnpm test

.prettierrc

@@ -4,6 +4,5 @@
 	"trailingComma": "none",
 	"printWidth": 100,
 	"plugins": ["prettier-plugin-svelte"],
-	"pluginSearchDirs": ["."],
 	"overrides": [{ "files": "*.svelte", "options": { "parser": "svelte" } }]
 }

README.md

@@ -2,15 +2,39 @@
 
 Web app to reduce the size of GeoJSON files.
 
+## How This Tool Reduces GeoJSON
+
+This tool reduces GeoJSON file sizes through two main techniques:
+
+### 1. Coordinate Precision Truncation
+
+Coordinates in GeoJSON files often have excessive decimal places (e.g., `1.123456789`). For most web mapping applications, 6 decimal places (~0.1 meters accuracy) is more than sufficient. This tool truncates coordinates to your specified precision, significantly reducing file size.
+
+### 2. Property Filtering
+
+GeoJSON features often contain many properties that aren't needed for display. You can select only the properties you need, removing unnecessary data.
+
 ## Developing
 
-1. Install dependencies: `bun install`
-1. Run: `bun run dev`
+1. Install dependencies: `pnpm install`
+2. Run dev server: `pnpm dev`
+3. Run tests: `pnpm test`
+4. Run checks: `pnpm check && pnpm lint`
 
 ## Building
 
 To create a production version:
 
 ```bash
-bun run build
-```
+pnpm build
+```
+
+## Testing
+
+```bash
+# Run tests once
+pnpm test
+
+# Watch mode
+pnpm test:watch
+```

eslint.config.js

@@ -0,0 +1,47 @@
+import js from '@eslint/js';
+import ts from 'typescript-eslint';
+import svelte from 'eslint-plugin-svelte';
+import prettier from 'eslint-config-prettier';
+import globals from 'globals';
+
+/** @type {import('eslint').Linter.Config[]} */
+export default [
+	{
+		ignores: [
+			'build/',
+			'.svelte-kit/',
+			'dist/',
+			'node_modules/',
+			'.netlify/',
+			'test-results/',
+			'playwright-report/'
+		]
+	},
+	js.configs.recommended,
+	...ts.configs.recommended,
+	...svelte.configs['flat/recommended'],
+	prettier,
+	...svelte.configs['flat/prettier'],
+	{
+		languageOptions: {
+			globals: {
+				...globals.browser,
+				...globals.node
+			}
+		}
+	},
+	{
+		files: ['**/*.svelte'],
+		languageOptions: {
+			parserOptions: {
+				parser: ts.parser
+			}
+		}
+	},
+	{
+		files: ['src/app.d.ts'],
+		rules: {
+			'@typescript-eslint/no-explicit-any': 'off'
+		}
+	}
+];

package.json

@@ -1,39 +1,49 @@
 {
-  "name": "reducegeojson",
-  "version": "0.0.1",
-  "private": true,
-  "scripts": {
-    "dev": "vite dev",
-    "build": "vite build",
-    "preview": "vite preview",
-    "test": "playwright test",
-    "check": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json",
-    "check:watch": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json --watch",
-    "lint": "prettier --plugin-search-dir . --check . && eslint .",
-    "format": "prettier --plugin-search-dir . --write ."
-  },
-  "devDependencies": {
-    "@playwright/test": "^1.28.1",
-    "@sveltejs/adapter-auto": "^2.0.0",
-    "@sveltejs/adapter-netlify": "^2.0.8",
-    "@sveltejs/kit": "^1.20.4",
-    "@typescript-eslint/eslint-plugin": "^6.0.0",
-    "@typescript-eslint/parser": "^6.0.0",
-    "bun-types": "^1.0.7",
-    "eslint": "^8.28.0",
-    "eslint-config-prettier": "^8.5.0",
-    "eslint-plugin-svelte": "^2.30.0",
-    "prettier": "^2.8.0",
-    "prettier-plugin-svelte": "^2.10.1",
-    "svelte": "^4.0.5",
-    "svelte-check": "^3.4.3",
-    "tslib": "^2.4.1",
-    "typescript": "^5.0.0",
-    "vite": "^4.4.2"
-  },
-  "type": "module",
-  "dependencies": {
-    "@turf/truncate": "^6.5.0",
-    "@types/geojson": "^7946.0.12"
-  }
+	"name": "reducegeojson",
+	"version": "0.0.1",
+	"private": true,
+	"scripts": {
+		"dev": "vite dev",
+		"build": "vite build",
+		"preview": "vite preview",
+		"test": "vitest run",
+		"test:watch": "vitest",
+		"check": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json",
+		"check:watch": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json --watch",
+		"lint": "prettier --check . && eslint .",
+		"format": "prettier --write .",
+		"prepare": "husky"
+	},
+	"lint-staged": {
+		"*.{js,ts,svelte,css,md,json}": [
+			"prettier --write",
+			"eslint --fix"
+		]
+	},
+	"devDependencies": {
+		"@eslint/js": "^9.39.1",
+		"@sveltejs/adapter-netlify": "^5.2.4",
+		"@sveltejs/kit": "^2.20.3",
+		"@sveltejs/vite-plugin-svelte": "^6.2.1",
+		"eslint": "^9.39.1",
+		"eslint-config-prettier": "^10.1.8",
+		"eslint-plugin-svelte": "^3.13.0",
+		"globals": "^15.14.0",
+		"husky": "^9.1.7",
+		"lint-staged": "^16.2.7",
+		"prettier": "^3.4.2",
+		"prettier-plugin-svelte": "^3.3.3",
+		"svelte": "^5.43.6",
+		"svelte-check": "^4.2.6",
+		"tslib": "^2.8.1",
+		"typescript": "^5.7.2",
+		"typescript-eslint": "^8.46.4",
+		"vite": "^7.2.2",
+		"vitest": "^2.1.8"
+	},
+	"type": "module",
+	"dependencies": {
+		"@turf/truncate": "^7.2.0",
+		"@types/geojson": "^7946.0.14"
+	}
 }