Add basic linting

Author: atjn

.eslintrc.cjs

@@ -0,0 +1,26 @@
+"use strict";
+
+module.exports = {
+
+  parserOptions: {
+    sourceType: "module",
+    ecmaVersion: "latest",
+  },
+
+  env: {
+    "es2022": true,
+    "node": true,
+  },
+
+  extends: [
+    "eslint:recommended",
+  ],
+
+  rules: {
+    "comma-style": ["error", "last"],
+    "eol-last": ["error", "always"],
+    "indent": ["error", 2, {"MemberExpression": "off", "SwitchCase": 1}],
+    "semi": ["error", "always"],
+  },
+
+};

index.js

@@ -14,7 +14,7 @@ import { join as joinPaths } from 'path';
  * 
  * @returns {Promise<{size: number | bigint, errors: Array<Error> | null}>} - An object containing the size of the folder in bytes and a list of encountered errors.
  */
-export default async function getFolderSize (itemPath, options) { return await core(itemPath, options, {errors: true}) }
+export default async function getFolderSize (itemPath, options) { return await core(itemPath, options, {errors: true}); }
 
 /**
  * Returns the size of the folder. If any errors are encountered while traversing the folder, they are silently ignored.
@@ -92,9 +92,9 @@ async function core (rootItemPath, options = {}, returnType = {}) {
     return {
       size: folderSize,
       errors: errors.length > 0 ? errors : null,
-    }
+    };
   } else {
     return folderSize;
   }
 
-}
+}