.eslintrc.json

{
  "root": true,
  "parserOptions": {
    "ecmaVersion": 2021,
    "sourceType": "module",
    "ecmaFeatures": {
      "jsx": true
    }
  },
  "plugins": ["testing-library", "jest-dom", "unused-imports"],
  "extends": [
    "eslint:recommended",
    "eslint-config-prettier",
    "react-app",
    "react-app/jest",
    "plugin:testing-library/react",
    "plugin:jest-dom/recommended"
  ],
  "rules": {
    "strict": ["error", "never"],
    "eqeqeq": "warn",
    "no-throw-literal": "warn",
    "unused-imports/no-unused-imports": "error",
    "unused-imports/no-unused-vars": [
      "warn",
      {
        "vars": "all",
        "varsIgnorePattern": "^_",
        "args": "after-used",
        "argsIgnorePattern": "^_"
      }
    ]
  },
  "env": {
    "browser": true
  },
  "overrides": [
    {
      "files": "**/*.+(ts|tsx)",
      "parser": "@typescript-eslint/parser",
      "parserOptions": {
        "project": "./tsconfig.json"
      },
      "plugins": ["@typescript-eslint/eslint-plugin"],
      "extends": [
        "plugin:@typescript-eslint/eslint-recommended",
        "plugin:@typescript-eslint/recommended",
        "eslint-config-prettier"
      ],
      "rules": {
        "@typescript-eslint/semi": "warn",
        "@typescript-eslint/explicit-function-return-type": "off",
        "@typescript-eslint/explicit-module-boundary-types": "off"
      }
    }
  ],

  "ignorePatterns": ["**/*.d.ts"]
}