.eslintrc

{
  "env": {
    "commonjs": true,
    "es6": true,
    "jest/globals": true
  },
  "parserOptions": {
    "ecmaVersion": 2018,
    "sourceType": "module"
  },
  "plugins": [
    "jest"
  ],
  "extends": ["eslint:recommended", "plugin:jest/recommended"],
  "rules": {
    "array-bracket-spacing": ["error", "never"],
    "brace-style": ["error","1tbs", {}],
    "comma-dangle": [2,"never"],
    "curly": "error",
    "linebreak-style": ["error", "unix"],
    "no-console": "off",
    "no-extra-parens": [2,"all"],
    "no-use-before-define": 2,
    "no-mixed-spaces-and-tabs": 2,
    "object-curly-spacing": ["error", "never"],
    "quotes": ["error", "single"],
    "semi": ["error", "always"],
    "space-before-blocks": ["error", "always"],
    "space-before-function-paren": ["error", "never"],
    "jest/no-disabled-tests": "warn",
    "jest/no-focused-tests": "error",
    "jest/no-identical-title": "error",
    "jest/prefer-to-have-length": "warn",
    "jest/valid-expect": "error"
  },
  "globals": {
    "window": true,
    "document": true,
    "console": true
  }
}