.eslintrc.json

{
  "env": {
    "node": true,
    "es6": true
  },
  "extends": ["plugin:prettier/recommended"],
  "overrides": [
    {
      "files": ["lib/**"],
      "rules": {
        "max-len": "error"
      }
    },
    {
      "files": ["benchmark/**", "examples/**"],
      "parserOptions": {
        "ecmaVersion": 2017
      },
      "rules": {
        "no-console": "off"
      }
    },
    {
      "files": ["test/**"],
      "parserOptions": {
        "ecmaVersion": 2017,
        "sourceType": "module"
      },
      "rules": {
        "handle-callback-err": "warn",
        "no-shadow": "off",
        "no-warning-comments": "off"
      }
    }
  ],
  "rules": {
    "array-bracket-spacing": ["error", "never"],
    "brace-style": ["error", "1tbs"],
    "camelcase": "error",
    "comma-style": ["error", "last"],
    "computed-property-spacing": ["error", "never"],
    "consistent-this": ["error", "self"],
    "curly": ["warn", "multi-line"],
    "dot-notation": "error",
    "eol-last": "error",
    "eqeqeq": ["error", "smart"],
    "key-spacing": "warn",
    "new-cap": ["error", {"capIsNew": false}],
    "no-console": "error",
    "no-floating-decimal": "error",
    "no-inner-declarations": "error",
    "no-mixed-spaces-and-tabs": "error",
    "no-redeclare": "error",
    "no-shadow": "warn",
    "no-spaced-func": "error",
    "no-trailing-spaces": "error",
    "no-undef": "error",
    "no-underscore-dangle": "off",
    "no-unused-vars": ["error", {"vars": "all", "args": "after-used"}],
    "no-use-before-define": ["error", "nofunc"],
    "no-var": "error",
    "no-warning-comments": [
      "warn",
      {"terms": ["todo"], "location": "anywhere"}
    ],
    "object-curly-spacing": ["error", "never"],
    "prefer-const": ["error", {"destructuring": "all"}],
    "quotes": ["error", "single"],
    "semi": ["error", "always"],
    "semi-spacing": ["error", {"before": false, "after": true}],
    "keyword-spacing": "error",
    "space-before-blocks": "error",
    "space-before-function-paren": [
      "error",
      {"anonymous": "always", "named": "never"}
    ],
    "space-in-parens": "error",
    "space-infix-ops": "error",
    "strict": "off"
  }
}