title: How to create 'Global' popup modal in react native?
body: <p>Let's say i have a "Food Ordering App" and it 3 screens(home, order, setting).  I wanna make a global popup modal that can be show up anywhere(from the whole screen) and anytime when the app get the food order from the service. I have a few questions regarding to this: </p>
  
  <blockquote>
    <ol>
    <li>where should i put my popup modal component ?</li>
    <li>how to triggered this popup modal ?</li>
    </ol>
  </blockquote>