CODE EXAMPLE FOR JAVASCRIPT

react-native loading screen

import React from 'react';
import { View, ActivityIndicator } from "react-native";

const MyActivityIndicator = () => {
	return (
      	<View style={{ flex: 1, justifyContent: "center"}}>
      		//size can be "small" or "large"
			<ActivityIndicator size="large" color="#00ff00" />
      	</View>
    );
}

export default MyActivityIndicator;