eslint 9

eslint.config.mjs

@@ -0,0 +1,22 @@
+import js from '@eslint/js';
+
+export default [
+  js.configs.recommended,
+  {
+    languageOptions: {
+      globals: {
+        URL: 'readonly',
+        Blob: 'readonly',
+        console: 'readonly',
+      },
+    },
+    rules: {
+      'no-var': 2, // require let or const instead of var
+      'prefer-arrow-callback': 2, // suggest using arrow functions as callbacks
+      'prefer-const': 2, // suggest using const declaration for variables that are never modified after declared
+      'prefer-rest-params': 2, // suggest using the rest parameters instead of arguments
+      'prefer-spread': 2, // suggest using the spread operator instead of .apply().
+      'prefer-template': 2, // suggest using template literals instead of strings concatenation
+    },
+  },
+];