Add parameter validation and refactor code

eslint.config.js

@@ -0,0 +1,87 @@
+module.exports = {
+  languageOptions: {
+    ecmaVersion: 12,
+    sourceType: 'module',
+    globals: {
+      Atomics: 'readonly',
+      SharedArrayBuffer: 'readonly',
+      process: 'readonly',
+      require: 'readonly',
+      module: 'readonly',
+      console: 'readonly',
+      __dirname: 'readonly',
+      setTimeout: 'readonly', // Added to define setTimeout as a global variable
+      window: 'writable' // Added to define window as a global variable, writable because it can be modified in a browser context
+    }
+  },
+  rules: {
+    // Existing rules
+    indent: ['error', 2],
+    'linebreak-style': ['error', 'unix'],
+    quotes: ['error', 'single'],
+    semi: ['error', 'always'],
+    // Added "eslint:recommended" rules
+    'array-callback-return': 'error',
+    'constructor-super': 'error',
+    'for-direction': 'error',
+    'getter-return': 'error',
+    'no-async-promise-executor': 'error',
+    'no-await-in-loop': 'error',
+    'no-class-assign': 'error',
+    'no-compare-neg-zero': 'error',
+    'no-cond-assign': 'error',
+    'no-const-assign': 'error',
+    'no-constant-binary-expression': 'error',
+    'no-constant-condition': 'error',
+    'no-constructor-return': 'error',
+    'no-control-regex': 'error',
+    'no-debugger': 'error',
+    'no-dupe-args': 'error',
+    'no-dupe-class-members': 'error',
+    'no-dupe-else-if': 'error',
+    'no-dupe-keys': 'error',
+    'no-duplicate-case': 'error',
+    'no-duplicate-imports': 'error',
+    'no-empty-character-class': 'error',
+    'no-empty-pattern': 'error',
+    'no-ex-assign': 'error',
+    'no-fallthrough': 'error',
+    'no-func-assign': 'error',
+    'no-import-assign': 'error',
+    'no-inner-declarations': 'error',
+    'no-invalid-regexp': 'error',
+    'no-irregular-whitespace': 'error',
+    // Additional "eslint:recommended" rules
+    'no-loss-of-precision': 'error',
+    'no-misleading-character-class': 'error',
+    'no-new-symbol': 'error',
+    'no-obj-calls': 'error',
+    'no-octal': 'error',
+    'no-prototype-builtins': 'error',
+    'no-redeclare': 'error',
+    'no-regex-spaces': 'error',
+    'no-self-assign': 'error',
+    'no-setter-return': 'error',
+    'no-shadow-restricted-names': 'error',
+    'no-sparse-arrays': 'error',
+    'no-this-before-super': 'error',
+    'no-undef': 'error',
+    'no-unexpected-multiline': 'error',
+    'no-unreachable': 'error',
+    'no-unsafe-finally': 'error',
+    'no-unsafe-negation': 'error',
+    'no-unused-labels': 'error',
+    'no-unused-vars': 'error',
+    'no-useless-catch': 'error',
+    'no-useless-escape': 'error',
+    'no-with': 'error',
+    'require-atomic-updates': 'error',
+    'require-yield': 'error',
+    'use-isnan': 'error',
+    'valid-typeof': 'error',
+    // ... additional rules as identified from the ESLint documentation
+    'accessor-pairs': 'error',
+    'unicode-bom': 'error',
+    // ... continue adding any remaining rules
+  }
+};