<Button> Component not working

[merbin2012]

I am using this plugin inside the iframe tag, all other code are working but simple <Button> is not working.

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import React, { Component } from 'react';
import { Button } from 'react-native';

export default class PizzaTranslator extends Component {

test()
{
  alert("sdfsd");
}

  render() {
    return (
      <Button title="I am button" onPress={this.test}/>
    );
  }
}