.eslintrc.json

{
  "root": true,
  "parserOptions": {
    "ecmaVersion": 6,
    "ecmaFeatures": {
      "jsx": true
    }
  },
  "rules": {
    "no-use-before-define": "off",
    "@typescript-eslint/no-use-before-define": ["warn"]
  },
  "overrides": [
    {
      "extends": [
        "eslint:recommended",
        "react-app",
        "react-app/jest",
        "plugin:@typescript-eslint/recommended",
        "prettier"
      ],
      "plugins": ["@typescript-eslint", "prettier"],
      "parser": "@typescript-eslint/parser",
      "files": ["**/*.ts", "**/*.tsx"],
      "rules": {
        "prettier/prettier": ["error"],
        "no-use-before-define": "off",
        "semi": "off",
        "react/jsx-filename-extension": [
          "error",
          {
            "extensions": [".jsx", ".tsx"]
          }
        ],
        "@typescript-eslint/no-use-before-define": ["error"],
        "@typescript-eslint/semi": ["error"]
      },
      "settings": {
        "react": {
          "version": "detect"
        }
      }
    }
  ]
}