.eslintrc

{
  "extends": "airbnb",
  "parser": "babel-eslint",
  "env": {
    "browser": false,
    "node": true,
    "es6": true,
    "mocha": false
  },
  "parserOptions": {
    "sourceType": "module"
  },
  "ecmaFeatures": {
    "arrowFunctions": true,
    "blockBindings": true,
    "classes": true,
    "defaultParams": true,
    "modules": true,
    "spread": true,
    "globalReturn": true
  },
  "rules": {
    "no-var": 2,
    "comma-dangle": 0,
    "no-param-reassign": 0,
    "consistent-return": 0,
    "prefer-const": 1,
    "arrow-body-style": 0,
    "no-trailing-spaces": 0,
    "padded-blocks": 0,
    "semi": 0,
    "object-curly-spacing": 0,
    "prefer-template": 1,
    "no-underscore-dangle": 0,
    "no-eval": "error",
    "indent": ["warn", 2],
    "quotes": ["warn", "single"],
    "no-console": ["error", { "allow": ["warn", "info" , "error"] }],
    "space-before-function-paren": ["error", "always"],
    "prefer-arrow-callback": [0, { "allowNamedFunctions": true }],
    "func-names": ["error", "never"],
    "no-use-before-define": [
      "error", {
        "functions": true,
        "classes": true
      }
    ],
    "max-nested-callbacks": [
      "error",
      5
    ],
  }
}