@wacg/eslint-config/index.js

ESLint configuration file for WACG projects

module.exports = {
  extends: [
    'eslint:recommended'
  ],
  parserOptions: {
    ecmaVersion: 2021,
    sourceType: 'module'
  },
  env: {
    node: true,
    commonjs: true,
    browser: true,
    es6: true
  },
  rules: {
    /**
     * custom rules
     * docs: https://eslint.org/docs/rules
     */

    // possible errors - https://eslint.org/docs/rules/#possible-errors
    /* activated in esnext preset */

    // best practices - https://eslint.org/docs/rules/#best-practices
    'eqeqeq': ['error', 'smart'],
    'no-empty-function': 'error',
    'no-invalid-this': 'error',
    'no-multi-spaces': 'error',
    'no-param-reassign': 'error',
    'no-return-assign': ['error', 'always'],
    'no-return-await': 'error',
    'no-self-compare': 'error',
    'no-useless-concat': 'error',
    'no-useless-return': 'error',
    'require-await': 'error',
    'yoda': 'error',

    // stylistic issues - https://eslint.org/docs/rules/#stylistic-issues
    'array-element-newline': ['error', 'consistent'],
    'block-spacing': 'error',
    'brace-style': ['error', '1tbs', { 'allowSingleLine': true }],
    'camelcase': 'error',
    'comma-spacing': ['error', { 'before': false, 'after': true }],
    'func-call-spacing': ['error', 'never'],
    'function-paren-newline': ['error', 'consistent'],
    'implicit-arrow-linebreak': ['error', 'beside'],
    'indent': ['error', 2],
    'no-multiple-empty-lines': ['error', { 'max': 1 }],
    'no-trailing-spaces': 'error',
    'no-unneeded-ternary': 'error',
    'no-whitespace-before-property': 'error',
    'object-curly-newline': ['error', { 'consistent': true }],
    'object-curly-spacing': ['error', 'always', {
      'objectsInObjects': true,
      'arraysInObjects': true
    }],
    'padded-blocks': ['error', 'never'],
    'quotes': ['error', 'single'],
    'semi': ['error', 'never'],
    'space-before-blocks': 'error',
    'space-before-function-paren': 'error',
    'space-in-parens': 'error',
    'space-infix-ops': 'error',

    // variables - https://eslint.org/docs/rules/#variables
    'no-use-before-define': 'error',

    // ECMAScript 6 - https://eslint.org/docs/rules/#ecmascript-6
    'arrow-body-style': ['error', 'as-needed'],
    'arrow-parens': ['error', 'as-needed'],
    'arrow-spacing': 'error',
    'no-duplicate-imports': 'error',
    'no-useless-rename': 'error',
    'no-var': 'error',
    'prefer-const': 'error',
    'prefer-template': 'error',
  }
}