build: eslint update

eslint.config.js

@@ -0,0 +1,44 @@
+import prettier from 'eslint-plugin-prettier';
+import globals from 'globals';
+import eslint from '@eslint/js';
+import PrettierRecommended from 'eslint-plugin-prettier/recommended';
+
+export default [
+  eslint.configs.recommended,
+  PrettierRecommended,
+  {
+    ignores: [
+      'eslint.config.js',
+      'core/external/*.js',
+      'plugins/external/*.js',
+      '**/node_modules',
+      '**/build',
+      '**/mobile',
+      '**/docs',
+      '**/json_examples',
+      '**/external',
+    ],
+  },
+  {
+    plugins: {
+      prettier,
+    },
+
+    languageOptions: {
+      globals: {
+        ...globals.browser,
+        ...globals.jquery,
+        ...globals.greasemonkey,
+      },
+
+      ecmaVersion: 2024,
+      sourceType: 'module',
+    },
+
+    rules: {
+      eqeqeq: 'error',
+      'spaced-comment': 'error',
+      'no-unused-expressions': 'error',
+    },
+  },
+];

package.json

@@ -7,12 +7,14 @@
   "private": true,
   "type": "module",
   "devDependencies": {
+    "@eslint/js": "^9.9.1",
     "chai": "^4.3.6",
-    "eslint": "^8.20.0",
-    "eslint-config-prettier": "^8.5.0",
-    "eslint-plugin-prettier": "^4.2.1",
+    "eslint": "^9.9.1",
+    "eslint-config-prettier": "^9.1.0",
+    "eslint-plugin-prettier": "^5.2.1",
+    "globals": "^15.9.0",
     "mocha": "^9.2.2",
-    "prettier": "^2.7.1"
+    "prettier": "^3.3.3"
   },
   "scripts": {
     "build": "npm run build:local",