First React Native

import React, { Component } from "react";
import { Button, StyleSheet, TextInput, View } from "react-native";

export default class App extends Component {
    constructor(props) {
        super(props);
    }

    render() {
        return (
            <View style={styles.container}>
                <TextInput
                    placeholder={"user@email.com"}
                    style={styles.textInput}
                />
                <TextInput
                    secureTextEntry={true}
                    placeholder={"Your super secret password"}
                    style={styles.textInput}
                />
                <Button title={"Login"} />
            </View>
        );
    }
}

const styles = StyleSheet.create({
    container: {
        flex: 1,
        backgroundColor: "#F5FCFF",
        justifyContent: "center",
        alignItems: "center"
    },
    welcome: {
        fontSize: 20,
        textAlign: "center",
        margin: 10
    },
    textInput: {
        borderWidth: 1,
        borderColor: "mediumaquamarine",
        height: 45,
        width: 300,
        padding: 5,
        marginBottom: 22
    }
});