.eslintrc.js

module.exports = {
  'env': {
    'browser': true,
    'commonjs': true,
    'es2022': true,
  },
  'parserOptions': {
    'ecmaVersion': 13,
  },
  'rules': {
    'no-cond-assign': 'off', // eslint:recommended
    'no-irregular-whitespace': 'error', // eslint:recommended
    'no-unexpected-multiline': 'error', // eslint:recommended
    'valid-jsdoc': ['error', {
      requireParamDescription: false,
      requireReturnDescription: false,
      requireReturn: false,
      prefer: {returns: 'return'},
    }],
    'curly': ['error', 'multi-line'],
    'guard-for-in': 'error',
    'no-caller': 'error',
    'no-extend-native': 'error',
    'no-extra-bind': 'error',
    'no-invalid-this': 'error',
    'no-multi-spaces': 'error',
    'no-multi-str': 'error',
    'no-new-wrappers': 'error',
    'no-throw-literal': 'error', // eslint:recommended
    'no-with': 'error',
    'prefer-promise-reject-errors': 'error',
    'no-unused-vars': ['error', {args: 'none'}], // eslint:recommended
    'array-bracket-newline': 'off', // eslint:recommended
    'array-bracket-spacing': ['error', 'never'],
    'array-element-newline': 'off', // eslint:recommended
    'block-spacing': ['error', 'never'],
    'brace-style': 'error',
    'camelcase': ['error', {properties: 'never'}],
    'comma-dangle': ['error', 'always-multiline'],
    'comma-spacing': 'error',
    'comma-style': 'error',
    'computed-property-spacing': 'error',
    'eol-last': 'error',
    'func-call-spacing': 'error',
    'indent': [
      'error', 2, {
        'CallExpression': {
          'arguments': 2,
        },
        'FunctionDeclaration': {
          'body': 1,
          'parameters': 2,
        },
        'FunctionExpression': {
          'body': 1,
          'parameters': 2,
        },
        'MemberExpression': 2,
        'ObjectExpression': 1,
        'SwitchCase': 1,
        'ignoredNodes': [
          'ConditionalExpression',
        ],
      },
    ],
    'key-spacing': 'error',
    'keyword-spacing': 'error',
    'linebreak-style': 'error',
    'max-len': ['error', {
      code: 80,
      tabWidth: 2,
      ignoreUrls: true,
      ignorePattern: 'goog\.(module|require)',
    }],
    'new-cap': 'error',
    'no-array-constructor': 'error',
    'no-mixed-spaces-and-tabs': 'error', // eslint:recommended
    'no-multiple-empty-lines': ['error', {max: 2}],
    'no-new-object': 'error',
    'no-tabs': 'error',
    'no-trailing-spaces': 'error',
    'object-curly-spacing': 'error',
    'one-var': ['error', {
      var: 'never',
      let: 'never',
      const: 'never',
    }],
    'operator-linebreak': ['error', 'after'],
    'padded-blocks': ['error', 'never'],
    'quote-props': ['error', 'consistent'],
    'quotes': ['error', 'single', {allowTemplateLiterals: true}],
    'require-jsdoc': ['error', {
      require: {
        FunctionDeclaration: true,
        MethodDefinition: true,
        ClassDeclaration: true,
      },
    }],
    'semi': 'error',
    'semi-spacing': 'error',
    'space-before-blocks': 'error',
    'space-before-function-paren': ['error', {
      asyncArrow: 'always',
      anonymous: 'never',
      named: 'never',
    }],
    'spaced-comment': ['error', 'always'],
    'switch-colon-spacing': 'error',
    'arrow-parens': ['error', 'always'],
    'constructor-super': 'error', // eslint:recommended
    'generator-star-spacing': ['error', 'after'],
    'no-new-symbol': 'error', // eslint:recommended
    'no-this-before-super': 'error', // eslint:recommended
    'no-var': 'error',
    'prefer-const': ['error', {destructuring: 'all'}],
    'prefer-rest-params': 'error',
    'prefer-spread': 'error',
    'rest-spread-spacing': 'error',
    'yield-star-spacing': ['error', 'after'],
    'linebreak-style': 0,
    'object-curly-spacing': 0,
    'require-jsdoc': 0,
    'max-len': ['error', { 'code': 200 }],
    'padded-blocks': 0,
    'no-undef-init': 'error',
  },
};