.eslintrc.json

{
  "env": {
    "browser": true,
    "node": true,
    "jest": true,
    "es6": true
  },
  "globals": {
    "_": true
  },
  "parser": "@typescript-eslint/parser",
  "parserOptions": {
    "ecmaVersion": 7,
    "sourceType": "module",
    "ecmaFeatures": {
      "jsx": true
    }
  },
  "plugins": ["react", "@typescript-eslint"],
  "extends": ["eslint:recommended", "plugin:react/recommended", "plugin:@typescript-eslint/recommended"],
  "settings": {
    "react": {
      "pragma": "React",
      "version": "16.6.3"
    }
  },
  "overrides": [
    {
      "files": ["*.js"],
      "rules": {
        "@typescript-eslint/no-var-requires": "off"
      }
    }
  ],
  "rules": {
    "eqeqeq": [2, "always"],
    "no-console": ["error", { "allow": ["log", "warn", "error"] }],
    "no-debugger": 2,
    "no-var": 1,
    "quotes": [2, "single"],
    "semi": [2, "always"],
    "space-before-function-paren": ["off"],
    "max-len": ["error", { "code": 120 }],
    "comma-dangle": ["off"]
  }
}