.eslintrc

{
  "root": true,

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

  "parserOptions": {
    "sourceType": "module",
    "ecmaVersion": 8,
    "ecmaFeatures": {

    }
  },

  "rules": {
    /* Errors */
    "no-undef": 2,
    "no-cond-assign": 2,
    "no-const-assign": 2,
    "no-dupe-args": 2,
    "no-dupe-keys": 2,
    "no-duplicate-case": 2,
    "no-ex-assign": 2,
    "no-func-assign": 2,
    "no-inner-declarations": 2,
    "no-invalid-regexp": 2,
    "no-sparse-arrays": 2,
    "no-unreachable": 2,
    "no-console": 2,
    "use-isnan": 2,
    "strict": [2, "never"],

    /* Warnings */
    "semi": [1, "always"],
    "indent": [1, 2, {"SwitchCase": 1}],
    "linebreak-style": [1, "unix"],
    "no-extra-semi": 1,
    "valid-typeof": 1,
    "semi-spacing": [1, { "before": false, "after": true }],
    "brace-style": [1, "1tbs", { "allowSingleLine": true }],
    "no-unused-vars": [1, { "vars": "all", "args": "none" }],
    "curly": 1,
    "object-curly-spacing": [1, "always"],
    "keyword-spacing": [2, { "before": true, "after": true }],
    "no-multi-spaces": 1,
    "space-before-blocks": 1,
    "no-multiple-empty-lines": [1, { "max": 1 }],
    "no-spaced-func": 1,
    "no-var": 1,
    "prefer-const": 1,
    "comma-dangle": 1,

    /* Disabled */
    "eqeqeq": 0
  }
}