REact native webview.js

webview.js

_openModal(){
  console.log("OPEN WEB VIEW");

  this.setState({modalVisible: !this.state.modalVisible});
}

.... render ...

<Modal
  animationType={"slide"}
  transparent={false}
  visible={this.state.modalVisible}
  onRequestClose={() => {alert("Modal has been closed.")}}
  >
 <View style={{marginTop: 22, flex: 1}}>
   <Text>TESTE</Text>
   <WebView
       source={{uri: `https://github.com/facebook/react-native?long${this.state.long}`}}
       style={{marginTop: 20, backgroundColor: 'red'}}
     />
 </View>
</Modal>