error Parsing error: Unexpected token : in my .eslintrc.json file. Why?

this is my code in my .eslintrc.json file:

{
    "env": {
      "browser": true,
      "es2021": true
    },
    "extends": ["eslint:recommended", "plugin:react/recommended"],
    "parserOptions": {
      "ecmaVersion": "latest",
      "sourceType": "module"
    },
    "plugins": ["react"],
    "rules": {
      "indent": ["error", "tab"],
      "linebreak-style": ["error", "windows"],
      "quotes": ["error", "single"],
      "semi": ["error", "always"]
    }
  }

this is the error, every time I try to run a commit:

PS C:\frontend> git commit -a -m "try"
[STARTED] Preparing lint-staged...
[SUCCESS] Preparing lint-staged...
[STARTED] Running tasks for staged files...
[STARTED] package.json — 3 files
[STARTED] **/*.{js,jsx,json} — 1 file
[STARTED] eslint . --fix
[FAILED] eslint . --fix [FAILED]
[FAILED] eslint . --fix [FAILED]
[FAILED] eslint . --fix [FAILED]
[STARTED] Applying modifications from tasks...
[SKIPPED] Skipped because of errors from tasks.
[STARTED] Reverting to original state because of errors...
[SUCCESS] Reverting to original state because of errors...
[STARTED] Cleaning up temporary files...
[SUCCESS] Cleaning up temporary files...

✖ eslint . --fix:
Warning: React version not specified in eslint-plugin-react settings. See https://github.com/jsx-eslint/eslint-plugin-react#configuration .

C:\frontend\.eslintrc.json
  3:10  error  Parsing error: Unexpected token :

✖ 1 problem (1 error, 0 warnings)

husky - pre-commit hook exited with code 1 (error)

can not figure out what is wrong with this line:

 "env": {

would very much appreciate any suggestions!
thank you!

The problem is that you are trying to lint a JSON file, but ESLint doesn't support linting of JSON files out of the box. You are left with two options now:

1. If JSON file linting is important to you, you can install and configure a plugin which supports this, such as eslint-plugin-json
2. If you don't care about linting your JSON files, remove the json extension from your lint script in your package.json:

{
  "scripts": {
    "lint-staged": {
      "**/*.{js,jsx}": [ "eslint . --fix" ]
    }
  }
}