.eslintrc.json

{
    "parser": "babel-eslint",
    "extends": "airbnb-base",
    "env": {
      "node": true,
      "es6": true,
      "browser": true
    },
    "parserOptions": {
      "ecmaVersion": 6,
      "sourceType": "module"
    },
    "rules": {
      "arrow-body-style": [
        "error",
        "as-needed"
      ],
      "arrow-parens": [
        "error",
        "always"
      ],
      "comma-dangle": [
        "error",
        "always-multiline"
      ],
      "indent": [
        "error",
        2,
        {
          "SwitchCase": 1,
          "MemberExpression": 1,
          "FunctionDeclaration": {
            "parameters": "first"
          },
          "FunctionExpression": {
            "parameters": "first"
          },
          "CallExpression": {
            "arguments": "first"
          },
          "ArrayExpression": "first",
          "ObjectExpression": "first"
        }
      ],
      "no-multi-spaces": [
        "error",
        {
          "exceptions": {
            "Property": true,
            "VariableDeclarator": true,
            "ImportDeclaration": true
          }
        }
      ],
      "max-len": "off",
      "newline-per-chained-call": "off",
      "no-console": "warn",
      "prefer-template": "error",
      "class-methods-use-this": "warn",
      "require-yield": "warn"
    }
  }