Project root:

npm install --save-dev eslint-config-airbnb eslint-config-airbnb-typescript eslint-config-prettier eslint-config-react-app eslint-import-resolver-typescript eslint-webpack-plugin eslint-plugin-flowtype eslint-plugin-import eslint-plugin-jsx-a11y eslint-plugin-react eslint-plugin-react-hooks babel-eslint eslint-plugin-jest @typescript-eslint/parser @typescript-eslint/eslint-plugin prettier prettier-eslint prettier-eslint-cli eslint-plugin-prettier

$ vim .eslintrc

{
  "plugins": ["prettier", "@typescript-eslint"],
  "extends": ["airbnb-typescript", "react-app", "prettier"],
  "parser": "@typescript-eslint/parser",
  "parserOptions": {
    "project": "./tsconfig.json"
  },
  "settings": {
    "import/resolver": {
      "typescript": {
        "alwaysTryTypes": true
      }
    }
  },
  "rules": {
    "object-curly-spacing": ["warn", "always"],
    "no-unused-vars": [
      "warn",
      {
        "vars": "all",
        "args": "none"
      }
    ],
    "@typescript-eslint/semi": [
      "off"
    ],
    "@typescript-eslint/no-unused-vars": [
      "warn",
      {
        "vars": "all",
        "args": "none"
      }
    ],
    "@typescript-eslint/no-explicit-any": [
      "error",
      {
        "ignoreRestArgs": true
      }
    ],
    "max-len": [
      "warn",
      {
        "code": 80,
        "ignoreStrings": true,
        "ignoreTemplateLiterals": true,
        "ignoreComments": true
      }
    ],
    "no-plusplus": [
      "error",
      {
        "allowForLoopAfterthoughts": true
      }
    ],
    "react/jsx-key": "error",
    "import/no-extraneous-dependencies": [
      "error",
      {
        "devDependencies": [
          "**/*.test.js",
          "**/*.test.jsx",
          "**/*.test.ts",
          "**/*.test.tsx",
          "src/tests/**/*"
        ]
      }
    ],
    "react/jsx-props-no-spreading": "off",
    "import/prefer-default-export": "off",
    "react/jsx-boolean-value": "off",
    "react/prop-types": "off",
    "react/no-unescaped-entities": "off",
    "react/jsx-one-expression-per-line": "off",
    "react/jsx-wrap-multilines": "off",
    "react/destructuring-assignment": "off"
  }
}

$ vim .eslintignore

public/*
src/vite-env.d.ts
vite.config.ts

$ vim .prettierrc

{
  "trailingComma": "es5",
  "printWidth": 100,
  "semi": false,
  "singleQuote": true,
  "tabWidth": 2
}

$ vim package.json

"scripts": {
    ..
    ..
    ..
    "lint": "eslint --ext .js,.jsx,.ts,.tsx src --color",
    "format": "prettier --write 'src/**/*.{ts,tsx,scss,css,json}'",
    "isready": "npm run format && npm run lint && npm run build"
}

Give it a try:

$ yarn run lint
$ yarn run format

medium article