.eslintrc

{
  "extends": "airbnb-base",
  "env": {
    "node": true,
    "mocha": true,
    "es6": true
  },
  "parserOptions": {
    "ecmaVersion": "latest"
  },
  "plugins": ["chai-friendly"],
  "rules": {
    "array-bracket-spacing": [1, "never"],
    "camelcase": [1],
    "class-methods-use-this": 0,                  // We want to allow helper functions that don't use 'this' in classes
    "linebreak-style": 0,
    "max-len": [0, 80, 4],
    "no-console": [0],
    "no-else-return": [0],
    "no-multi-spaces": [0],
    "no-multiple-empty-lines": [0],               // allow indented comments (like this one)
    "no-plusplus": [0],
    "no-underscore-dangle": [0],
    "object-curly-newline": 0,
    "object-curly-spacing": [1,
      "always", {
        "arraysInObjects": false,
        "objectsInObjects": true
      }
    ],
    "operator-linebreak": [1, "after"],
    "padded-blocks": [1],
    "prefer-destructuring": 1,
    "quotes": [1, "single", "avoid-escape"],
    "radix": 0,                                   // Dec 2018: We always use base 10, so specifying it each time seems excessive
    "space-before-function-paren": [1, {"anonymous": "always", "named": "always"}],
    "space-in-parens": [1],
    "template-curly-spacing": ["warn", "never"],
    "chai-friendly/no-unused-expressions": 2
  }
}