.eslintrc.json

{
  "extends": "airbnb-base",

  "env": {
    "es6": true,
    "node": true,
    "mocha": true
  },

  "rules": {
    // Don't allow any dangling commas
    "comma-dangle": ["error", "never"],

    // It is ok if a property of an obj gets reassigned but not the object itself
    "no-param-reassign": ["error", { "props": false }],

    // Allow devDependencies in this directory, since it is for scripts only.
    "import/no-extraneous-dependencies": ["error", {
      "devDependencies": true
    }],

    // Require spaces before block comments...
    "lines-around-comment": [2, {
      // ...except when first line of array, or...
      "allowArrayStart": true,
      // ...except when first line of block, or...
      "allowBlockStart": true,
      // ...except when first line of object.
      "allowObjectStart": true
    }],

    // Visually set-off the var assignment from the rest of code.
    "newline-after-var": 2,
    // Visually set-off the return from the rest of code.
    "newline-before-return": 2,

    // This is an es6 rule, but enabling it requires node 6+
    "strict": ["off"],

    // Require developers to describe function purpose, arguments, and returns.
    "require-jsdoc": 2,
    "valid-jsdoc": [2, {
      "requireReturn": false
    }]
  }
}