title: fetch is not defined error in React Native
body: <p>I am trying to use fetch in my project but there is an error saying </p>
  
  <blockquote>
    <p>fetch is not defined</p>
  </blockquote>
  
  <p><a href="https://i.stack.imgur.com/PsQ3W.png" rel="noreferrer"><img src="https://i.stack.imgur.com/PsQ3W.png" alt="enter image description here"></a></p>
  
  <p>Someone knowing why?</p>