Add ESlint and lint action

.github/workflows/ci.yml

@@ -0,0 +1,31 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [20]
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node-version }}
+          cache: "yarn"
+
+      - name: Install dependencies
+        run: yarn install --frozen-lockfile
+
+      - name: Run lint
+        run: yarn lint

.prettierrc

@@ -0,0 +1,4 @@
+{
+  "printWidth": 80,
+  "tabWidth": 2
+}

eslint.config.mjs

@@ -0,0 +1,18 @@
+import globals from "globals";
+import { defineConfig } from "eslint/config";
+import eslintConfigPrettier from "eslint-config-prettier/flat";
+
+export default defineConfig([
+  {
+    files: ["**/*.{js,mjs,cjs}"],
+    languageOptions: { globals: { ...globals.browser, ...globals.node } },
+    rules: {
+      "spaced-comment": ["error", "always"],
+      "capitalized-comments": ["error", "always"],
+    },
+  },
+  {
+    ignores: ["dist/*", "tests/coverage/*"],
+  },
+  eslintConfigPrettier,
+]);

package.json

@@ -7,7 +7,8 @@
     "prebuild": "rimraf dist",
     "build": "webpack --config webpack.config.js --mode production",
     "start": "webpack serve --config webpack.config.js --mode development",
-    "format": "prettier --write \"**/*.js\"",
+    "lint": "eslint && prettier --check \"**/*.js\"",
+    "lint:fix": "eslint --fix && prettier --write \"**/*.js\"",
     "postinstall": "patch-package",
     "test": "jest --config tests/jest.config.js",
     "upload-examples": "node scripts/uploadExamples.js",
@@ -37,6 +38,9 @@
     "bson-objectid": "^2.0.4",
     "cross-fetch": "^4.0.0",
     "dotenv": "^16.4.5",
+    "eslint": "^9.32.0",
+    "eslint-config-prettier": "^10.1.8",
+    "globals": "^16.3.0",
     "html-webpack-plugin": "^5.5.3",
     "jest": "^29.7.0",
     "jest-environment-jsdom": "^29.7.0",