thingies

parts/3/phonebookBackend/eslint.config.mjs

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+import js from "@eslint/js";
+import globals from "globals";
+import { defineConfig } from "eslint/config";
+import stylisticJs from "@stylistic/eslint-plugin-js";
+
+export default defineConfig([
+  {
+    files: ["**/*.{js,mjs,cjs}"],
+    plugins: { js },
+    extends: ["js/recommended"],
+  },
+  { files: ["**/*.js"], languageOptions: { sourceType: "commonjs" } },
+  {
+    files: ["**/*.{js,mjs,cjs}"],
+    languageOptions: { globals: globals.browser },
+  },
+  {
+    plugins: { "@stylistic/js": stylisticJs },
+    rules: {
+      "@stylistic/js/indent": ["error", 2],
+      "@stylistic/js/linebreak-style": ["error", "unix"],
+      "@stylistic/js/quotes": ["error", "single"],
+      "@stylistic/js/semi": ["error", "never"],
+    },
+  },
+]);