title: React Native - what does "type" mean on Alert component method?
body: <p>I'm new in React Native, and when I read about <a href="https://facebook.github.io/react-native/docs/alert.html#alert" rel="nofollow noreferrer">Alert</a> component, I've seen about <code>alert</code> method <code>static alert(title, message?, buttons?, options?, type?)</code></p>
  
  <p>The example given by facebook :</p>
  
  <pre><code>Alert.alert(
     //Title
    'Alert Title',
     //Message
    'My Alert Msg', 
     //Button
    [
      {text: 'Ask me later', onPress: () =&gt; console.log('Ask me later pressed')},
      {text: 'Cancel', onPress: () =&gt; console.log('Cancel Pressed'), style: 'cancel'},
      {text: 'OK', onPress: () =&gt; console.log('OK Pressed')},
    ],
     //Options
    { cancelable: false } 
  )
  </code></pre>
  
  <p>and there's no example about what is <code>type</code> do, someone can tell me for what those <code>type</code>?</p>
  
  <p>and is there a way to showing <code>Alert</code> without <code>Title</code>?</p>