.eslintrc.json

{
  "env": {
    "browser": true,
    "es6": true,
    "node": true
  },
  "extends": [
    "eslint:recommended",
    "plugin:react/recommended",
    "plugin:@typescript-eslint/eslint-recommended",
    "plugin:@typescript-eslint/recommended",
    "react-app"
  ],
  "globals": {
    "Atomics": "readonly",
    "SharedArrayBuffer": "readonly"
  },
  "parser": "@typescript-eslint/parser",
  "parserOptions": {
    "ecmaFeatures": {
      "jsx": true
    },
    "ecmaVersion": 2018,
    "sourceType": "module"
  },
  "plugins": ["react", "@typescript-eslint", "prettier", "deprecation"],
  // For eslint-plugin-deprecation:
  // https://stackoverflow.com/a/64488474/10876256
  "overrides": [
    {
      "files": ["*.ts", "*.tsx"],
      "parserOptions": {
        // for eslint-plugin-deprecation
        "project": ["./tsconfig.json"]
      }
    }
  ],
  "rules": {
    "prettier/prettier": "warn",
    "deprecation/deprecation": "warn",
    "no-unused-vars": "warn",
    "no-case-declarations": "off",
    "no-empty": "off",
    "prefer-const": "warn",
    "no-console": "warn",
    "react/prop-types": "off",
    "react/display-name": "off",
    "@typescript-eslint/explicit-function-return-type": "off",
    "@typescript-eslint/no-namespace": "off",
    "@typescript-eslint/no-empty-interface": "warn",
    "@typescript-eslint/explicit-module-boundary-types": "off",
    "@typescript-eslint/ban-types": "off"
  }
}