.eslintrc

{
  "plugins": ["node", "immutable", "chai-friendly", "mocha"],
  "root": true,
  "env": {
    "node": true,
    "mocha": true
  },
  "extends": [
    "eslint:recommended", 
    "plugin:node/recommended",
    "plugin:chai-friendly/recommended",
    "plugin:mocha/recommended"
  ],
  "rules": {
    "semi": [2, "never"],
    "strict": 0,
    "quotes": ["error", "single", { "avoidEscape": true }],
    "object-curly-spacing": [2, "always"],
    "array-bracket-spacing": [2, "never"],
    "computed-property-spacing": [2, "never"],
    "no-unused-vars": 0,
    "no-multi-spaces": 1,
    "no-constant-condition": 1,
    "camelcase": 0,
    "no-use-before-define": [
      2,
      "nofunc"
    ],
    "no-useless-escape": 0,
    "no-unsafe-finally": 0,
    "no-underscore-dangle": 0,
    "no-unused-expressions": 0,
    "chai-friendly/no-unused-expressions": 2,
    "comma-dangle": 0,
    "arrow-spacing": "error",
    "space-in-parens": ["error", "never"],
    "no-else-return": ["error", { "allowElseIf": false }],
    "no-useless-return": "error",
    "rest-spread-spacing": "error",
    "keyword-spacing": ["error", { "before": true, "after": true }],
    "key-spacing": ["error", { "beforeColon": false, "afterColon": true }],
    "prefer-template": "error",
    "no-var": "error",
    "prefer-const": [
      "error", {
        "destructuring": "all",
        "ignoreReadBeforeAssign": false
      }
    ],
    "arrow-body-style": ["error", "as-needed"],
    "arrow-parens": ["error", "as-needed"],
    "brace-style": ["error", "1tbs", { "allowSingleLine": true }],
    "max-len": ["error", { "code": 120 , "ignoreTemplateLiterals": true}],
    "mocha/no-mocha-arrows": 0,
    "mocha/no-setup-in-describe": 0
  },
  "overrides": [
    {
      "files": ["*.test.js"],
      "rules": {
        "immutable/no-let": 0
      }
    }
  ],
}