.eslintrc.json

{
  "env": {
    "browser": true,
    "node": true,
    "es6": true,
    "mocha": true
  },
  "extends": "eslint:recommended",
  "parserOptions": {
      "sourceType": "module"
  },
  "globals": {
    "nv": true,
    "d3": true
  },
  "rules": {
    "indent": [
      "error",
      2
    ],
    "linebreak-style": [
      "error",
      "unix"
    ],
    "quotes": [
      "error",
      "single"
    ],
    "object-curly-spacing": [
      "error",
      "always"
    ],
    "prefer-arrow-callback": [
      "never",
      {
        "allowNamedFunctions": true
      }
    ],
    "arrow-parens": [
      "error",
      "always"
    ],
    "space-before-function-paren": ["error", {
      "anonymous": "never",
      "named": "never",
      "asyncArrow": "never"
    }],
    "semi": [
      "error",
      "always"
    ],
    "comma-dangle": ["error", {
      "arrays": "never",
      "objects": "never",
      "imports": "never",
      "exports": "never",
      "functions": "ignore"
    }]
  }
}