title: How to use .env in react js
body: <p>How to use .env in react . I can get access to .env.development and .env.production with</p>
  
  <pre><code> "start":"react-scripts start",
   "build": "react-scripts build",
  </code></pre>
  
  <p>How to get access to another like .env.staging ?</p>
  
  <p>I gave like this </p>
  
  <pre><code>"build_staging": "set REACT_APP_ENV=staging &amp; react-scripts build",
  </code></pre>
  
  <p>but not working.</p>
  
  <p>Any suggestions please.</p>