.eslintrc.js

module.exports = {
  env: {
    node: true,
    es2021: true,
    jest: true,
  },
  extends: ['standard', 'plugin:jest/recommended', 'prettier'],
  parserOptions: {
    ecmaVersion: 'latest',
    sourceType: 'module',
  },
  plugins: ['jest', 'prettier'],
  rules: {
    'jest/no-focused-tests': 'error',
    'jest/no-identical-title': 'error',
    'jest/prefer-to-have-length': 'warn',
    'jest/valid-expect': 'error',
    'no-unused-vars': ['error', { argsIgnorePattern: '^_' }],
    'prefer-const': 'error',
    'no-var': 'error',
    'prettier/prettier': 'error',
    'comma-dangle': 'off',
    semi: 'off',
  },
  overrides: [
    {
      files: ['tests/**/*.js'],
      env: {
        jest: true,
      },
    },
  ],
};