Issue while trying to initialize the react property

Issue details

1. .env value not initialized in the react property
   
2. siteKey value is always blank

Property in react

const [siteKey] = useState(process.env.REACT_CAPTCHA_SITE_KEY);

Key in .env

REACT_CAPTCHA_SITE_KEY='some key'

Html

<ReCAPTCHA sitekey={siteKey} />

I saw Some Issue in your code, First thing is,UseState hook initialization is wrong. It Should be,

  const [siteKey, setsiteKey] = useState(process.env.REACT_APP_CAPTCHA_SITE_KEY);

And also You don't need to use this environment variable as useState, because it is not changing so, when you need to access environment variable, use as below,

ex:const siteKey=process.env.REACT_APP_CAPTCHA_SITE_KEY;

Other Important Issues are,

Your environment variable should prefix with the REACT_APP_ in the .env file. ex:process.env.REACT_APP_SOME_VARIABLE

And possible Issue can be, your .env file is not in your root which is that, within the same directory as the package. json file.