.eslintrc

{
  "extends": [ "eslint:recommended" ],
  "plugins": [ "babel" ],
  "parser": "babel-eslint",
  "parserOptions": {
    "sourceType": "module",
    "ecmaVersion": 6,
    "ecmaFeatures": {
      "impliedStrict": true,
      "experimentalObjectRestSpread": true,
    }
  },
  "env": {
    "browser": true,
    "node": true,
    "es6": true,
  },
  "rules": {
    "babel/new-cap": 1,
    "babel/object-curly-spacing": ["error", "always"],
    "babel/no-invalid-this": 1,
    "babel/semi": ["error", "always"],
    "no-console": ["error", { "allow": ["warn", "error"] }],
    "semi": ["error", "always"],
    "no-fallthrough": ["error", { "commentPattern": "cascade" }],
    "arrow-parens": ["error", "as-needed", { "requireForBlockBody": true }],
    "prefer-promise-reject-errors": ["error", { "allowEmptyReject": true }],
    "eqeqeq": ["error", "always"],
    "max-len": ["error", {
      "ignoreTrailingComments": true,
      "ignoreUrls": true,
      "ignoreStrings": true,
      "ignoreTemplateLiterals": true,
      "ignoreRegExpLiterals": true,
    }],
    "indent": ["error", 2, {
      "SwitchCase": 1,
      "MemberExpression": 1,
      "FunctionDeclaration": { "parameters": 2 },
      "CallExpression": { "arguments": 1 },
    }],
  }
}