.eslintrc.json

{
  "extends": ["standard", "plugin:promise/recommended"],
  "plugins": ["promise"],
  "env": {
    "node": true,
    "mocha": true,
    "jest": true
  },
  "rules": {
    // Strict mode
    "strict": [2, "global"],

    // Code style
    "indent": ["error", 4],
    "quotes": [2, "double", { "avoidEscape": true }],
    "semi": ["error", "always"],
    "space-before-function-paren": [
      "error",
      { "anonymous": "always", "named": "never", "asyncArrow": "always" }
    ],
    "no-use-before-define": 0,
    "no-unused-expressions": "off",
    "eqeqeq": [2, "smart"],
    "dot-notation": [2, { "allowKeywords": true, "allowPattern": "" }],
    "no-redeclare": [2, { "builtinGlobals": true }],
    "no-trailing-spaces": [2, { "skipBlankLines": true }],
    "eol-last": 1,
    "comma-spacing": [2, { "before": false, "after": true }],
    "camelcase": [2, { "properties": "always" }],
    "no-mixed-spaces-and-tabs": [2, "smart-tabs"],
    "comma-dangle": [1, "always-multiline"],
    "no-dupe-args": 2,
    "no-dupe-keys": 2,
    "no-debugger": 0,
    "no-undef": 2,
    "object-curly-spacing": [2, "always"],
    "max-len": [2, 200, 2],
    "generator-star-spacing": ["error", "before"],
    "promise/avoid-new": 0,
    "promise/always-return": 0
  }
}