update dev dependencies

.eslintrc.json

@@ -1,20 +0,0 @@
-{
-  "root": true,
-  "extends": "eslint:recommended",
-  "env": {
-    "browser": true,
-    "es2020": true
-  },
-  "parserOptions": {
-    "ecmaVersion": 2020,
-    "sourceType": "module"
-  },
-  "rules": {
-    "object-shorthand": "error",
-    "prefer-arrow-callback": "error",
-    "arrow-body-style": ["error", "as-needed"],
-    "no-var": "error",
-    "prefer-template": "error",
-    "no-console": "error"
-  }
-}

.node-version

@@ -1 +1 @@
-v20
+20

.stylelintrc.json

@@ -1,7 +1,7 @@
 {
-  "extends": ["stylelint-config-standard", "stylelint-rscss/config"],
+  "extends": "stylelint-config-standard",
   "rules": {
     "property-no-vendor-prefix": null,
-    "selector-class-pattern": "[a-z\\-][a-z0-9\\-]+"
+    "selector-class-pattern": "^[\\-_]?([a-z][a-z0-9]*)(-[a-z0-9]+)*$"
   }
 }

eslint.config.js

@@ -0,0 +1,26 @@
+import js from '@eslint/js';
+import compat from 'eslint-plugin-compat';
+import globals from 'globals';
+
+export default [
+  js.configs.recommended,
+  compat.configs['flat/recommended'],
+  { ignores: ['es5'] },
+  {
+    languageOptions: {
+      ecmaVersion: 2020,
+      sourceType: 'module',
+      globals: {
+        ...globals.browser,
+      },
+    },
+    rules: {
+      'object-shorthand': 'error',
+      'prefer-arrow-callback': 'error',
+      'arrow-body-style': ['error', 'as-needed'],
+      'no-var': 'error',
+      'prefer-template': 'error',
+      'no-console': 'error',
+    },
+  },
+];

package.json

@@ -33,14 +33,18 @@
     "test-coverage": "bash scripts/test-coverage.sh"
   },
   "devDependencies": {
+    "@eslint/js": "^9.17.0",
     "@playwright/test": "^1.33.0",
     "c8": "^10.1.2",
-    "eslint": "^8.20.0",
-    "eslint-plugin-compat": "^5.0.0",
+    "eslint": "^9.17.0",
+    "eslint-plugin-compat": "^6.0.2",
     "prettier": "^3.1.0",
     "s4d": "^0.2.0",
-    "stylelint": "^15.11.0",
-    "stylelint-config-standard": "^34.0.0",
-    "stylelint-rscss": "^0.4.0"
-  }
+    "stylelint": "^16.12.0",
+    "stylelint-config-standard": "^36.0.1"
+  },
+  "browserslist": [
+    "defaults",
+    "not op_mini all"
+  ]
 }

test/.eslintrc.json

@@ -1,10 +0,0 @@
-{
-  "extends": "../.eslintrc.json",
-  "env": {
-    "node": true
-  },
-  "parserOptions": {
-    "ecmaVersion": 2022,
-    "sourceType": "module"
-  }
-}

test/coverage.js

@@ -1,3 +1,4 @@
+/* global process */
 import { test } from '@playwright/test';
 import { randomUUID } from 'crypto';
 import { promises as fs } from 'fs';