.eslintrc.js

module.exports = {
  /* Extend airbnb's style-guide enforcement */
  "extends": "eslint-config-airbnb/base",
  "parserOptions": {
    "ecmaVersion": 6,
    "sourceType": "module",
  },
  "env": {
    "es6": true,
    "node": true,
    "browser": true
  },
  "rules": {
    "import/no-unresolved": 0,
    "brace-style": [2, "stroustrup", { "allowSingleLine": true  }],
    /* Warn about long line */
    "max-len": [1, 100, 2],
    /* Warn about use of console */
    "no-console": [1],
    /* Warn about use of debugger */
    "no-debugger": [1],
    /* Allow nested ternaries */
    "no-nested-ternary": 0,
    /* Warn when declaring a variable with a name that already exists in the containing scope */
    "no-shadow": [1],
    /* Forbid referencing a variable before it is defined, but allow using declared functions */
    "no-use-before-define": [2, "nofunc"],
    /* Warn when referencing an undefined variable */
    "no-undef": [1],
    /* Forbid expressions that are never used */
    "no-unused-expressions": [2, { allowShortCircuit: true, allowTernary: true  }],
    /* Warn when declaring a variable without using it */
    "no-unused-vars": [1, {"vars": "local", "args": "none"}],
    "no-warning-comments": [1, {"terms": ["fixme", "todo"], "location": "start"}],
    "valid-jsdoc": [2, {
      "requireReturn": false,
      "requireParamDescription": false,
      "requireReturnDescription": false
    }],
  },
}