.eslintrc.json

{
  "env": {
    "browser": true
  },
  "extends": ["airbnb", "plugin:jest/all"],
  "parser": "@babel/eslint-parser",
  "plugins": ["@babel", "jest"],
  "rules": {
    "func-names": 0,
    "import/order": ["error", {
      "alphabetize": {"order": "asc"},
      "groups": [
        ["builtin", "external"],
        ["sibling", "parent", "internal"],
        "index"
      ],
      "newlines-between": "always",
      "pathGroups": [
        {
          "pattern": "./*.scss",
          "group": "index"
        },
        {
          "pattern": "../*.scss",
          "group": "index"
        }
      ]
    }],
    "no-plusplus": 0,
    "jest/prefer-expect-assertions": ["error", {
      "onlyFunctionsWithAsyncKeyword": true
    }],
    "jest/no-hooks": ["error", {
      "allow": ["beforeEach"]
    }],
    "lines-between-class-members": ["error", "always", {
      "exceptAfterSingleLine": true
    }],
    "max-len": [2, 80, 4],
    "no-underscore-dangle": ["error", {
      "allow": ["_isMounted"]
    }],
    "no-unused-expressions": ["error", {
      "allowTernary": true
    }]
  },
  "settings": {
    "import/resolver": "webpack"
  }
}