title: Transpile custom JSX tag to custom function
body: <p>React's JSX transpiler converts a tag:</p>
  
  <p><code>&lt;MyComponent /&gt;</code></p>
  
  <p>to:</p>
  
  <p><code>React.createElement("MyComponent")</code></p>
  
  <hr>
  
  <p>I need to develop something so that when using a tag:</p>
  
  <p><code>&lt;TagFunction msg={varMessage} /&gt;</code></p>
  
  <p>it is converted to:</p>
  
  <p><code>function() {alert(varMessage); }</code></p>
  
  <hr>
  
  <p>It sounds strange, but this is a simplified example of the real need.</p>
  
  <p>Would it be possible to do that?</p>