eslint.config.js

const js = require('@eslint/js');
const globals = require('globals');

module.exports = [
    js.configs.recommended,
    {
        languageOptions: {
            globals: {
                ...globals.es6,
                ...globals.node,
                ...globals.jasmine,
                ...globals.BigInt,
            },
            parserOptions: {
                ecmaFeatures: {globalReturn: true}
            },
            sourceType: 'commonjs',
            ecmaVersion: 2020
        },
        rules: {
            'no-var': 'error',
            'prefer-const': 'error',
            'prefer-arrow-callback': 'error',
            'no-else-return': 'error',
            'no-multi-spaces': 'error',
            'no-whitespace-before-property': 'error',
            camelcase: 'error',
            'new-cap': 'error',
            'no-console': 'error',
            'comma-dangle': 'error',
            'no-shadow': 'error',
            'object-shorthand': ['error', 'properties'],
            indent: [
                'error',
                4,
                {
                    SwitchCase: 1
                }
            ],
            quotes: ['error', 'single'],
            semi: ['error', 'always']
        }
    }
];