.eslintrc.js

module.exports = {
  env: {
    browser: true,
    es6: true,
    node: true,
    mocha: true
  },
  parserOptions: {
    sourceType: 'module'
  },
  extends: 'eslint:recommended',
  // For the full list of rules, see: http://eslint.org/docs/rules/
  rules: {
    complexity: [2, 55],
    'max-statements': [2, 115],
    'no-unreachable': 1,
    'no-useless-escape': 'off',
    'no-extra-semi': 'off',
    'no-console': 'off',
    // To flag presence of console.log without breaking linting:
    //"no-console": ["warn", { allow: ["warn", "error"] }],
    'require-jsdoc': [
      'error',
      {
        require: {
          FunctionDeclaration: true,
          MethodDefinition: true,
          ClassDeclaration: true,
          ArrowFunctionExpression: false
        }
      }
    ],
    'valid-jsdoc': [
      2,
      {
        requireReturnDescription: false,
        requireReturn: false,
        requireParamDescription: false,
        requireReturnType: true
      }
    ],
    'guard-for-in': 1
  }
}