.eslintrc.json

{
  "extends": ["eslint:recommended", "plugin:react/recommended", "plugin:prettier/recommended"],
  "env": {
    "browser": true,
    "commonjs": true,
    "es6": true,
    "node": true,
    "jest/globals": true
  },
  "globals": {
    "chrome": false,
    "browser": false,
    "globalThis": true
  },
  "plugins": ["jest"],
  "parser": "@babel/eslint-parser",
  "parserOptions": {
    "ecmaVersion": 7,
    "ecmaFeatures": {
      "experimentalObjectRestSpread": true,
      "experimentalDecorators": true,
      "jsx": true
    },
    "sourceType": "module"
  },
  "settings": {
    "react": {
      "version": "detect"
    }
  },
  "rules": {
    "strict": 0,
    "semi": ["error", "never"],
    "array-callback-return": "warn",
    "getter-return": "warn",
    "no-const-assign": "warn",
    "no-this-before-super": "warn",
    "no-undef": "warn",
    "no-unreachable": "warn",
    "no-unused-vars": ["warn", { "argsIgnorePattern": "^_" }],
    "constructor-super": "warn",
    "valid-typeof": "warn",
    "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",
    "react/prop-types": "error",
    "prettier/prettier": "error"
  }
}