migrate eslint config

Author: mnkhouri

.eslintrc

@@ -0,0 +1,43 @@
+import { defineConfig } from "eslint/config";
+import typescriptEslint from "@typescript-eslint/eslint-plugin";
+import tsParser from "@typescript-eslint/parser";
+import path from "node:path";
+import { fileURLToPath } from "node:url";
+import js from "@eslint/js";
+import { FlatCompat } from "@eslint/eslintrc";
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+const compat = new FlatCompat({
+    baseDirectory: __dirname,
+    recommendedConfig: js.configs.recommended,
+    allConfig: js.configs.all
+});
+
+export default defineConfig([{
+    extends: compat.extends(
+        "eslint:recommended",
+        "plugin:@typescript-eslint/eslint-recommended",
+        "plugin:@typescript-eslint/recommended",
+        "plugin:@typescript-eslint/recommended-requiring-type-checking",
+        "prettier",
+    ),
+
+    plugins: {
+        "@typescript-eslint": typescriptEslint,
+    },
+
+    languageOptions: {
+        parser: tsParser,
+        ecmaVersion: 5,
+        sourceType: "script",
+
+        parserOptions: {
+            project: "./tsconfig.json",
+        },
+    },
+
+    rules: {
+        "@typescript-eslint/explicit-function-return-type": "off",
+    },
+}]);

eslint.config.mjs

@@ -36,6 +36,8 @@
   },
   "homepage": "https://github.com/mnkhouri/react-circular-slider#readme",
   "devDependencies": {
+    "@eslint/eslintrc": "^3.3.1",
+    "@eslint/js": "^9.26.0",
     "@types/react": "^19.1.3",
     "@types/react-dom": "^19.1.3",
     "@types/react-syntax-highlighter": "^15.5.13",
@@ -63,4 +65,4 @@
       "pre-commit": "STATUS=$(git diff); npm run build && ([ \"$(git diff)\" == \"$STATUS\" ] || (echo 'git status changed!' && exit 1))"
     }
   }
-}
+}