.eslintrc.js

module.exports = {
    env: {
        es6: true,
        node: true,
        mocha: true,
    },
    extends: [
        'eslint:recommended',
        'plugin:import/errors',
        'plugin:import/warnings',
    ],
    parser: 'babel-eslint',
    settings: {
        'import/resolver': [
            {
                node: {
                    extensions: ['.js'],
                }
            }
        ],
    },
    rules: {
        quotes: ['error', 'single'],
        'comma-dangle': [
            'error',
            {
                objects: 'always-multiline',
                arrays: 'always-multiline',
                imports: 'always-multiline',
                exports: 'always-multiline',
                functions: 'always-multiline',
            },
        ],
        indent: ['error', 4],
        'max-len': ['error', 200],
        'no-trailing-spaces': ['error', { skipBlankLines: true }],
        'no-extra-boolean-cast': 'off',
        'no-nested-ternary': 'off',
        'import/no-unresolved': [2, { commonjs: true }],
    },
};