OTP and CVV Input Field

import React , { Component } from 'react';
import { View, TextInput, Alert } from 'react-native';
import CustomTextInput from './CustomTextInput';

class otpandcvv extends Component {

    constructor(props) {
        super(props);
        this.maxLength = 6;
    }

    changeFocusToNext(id) {
        if (id + 1 !== this.maxLength) {
            this.refs[id + 1].focus();
        }
    }

    changeFocusToPrevious(id) {
        if (id === 0) {
            this.refs[0].focus();
        } else {
            this.refs[id - 1].focus();
        }
    }

    render() {
        let customTextInput = [];
        for (let i = 0; i < this.maxLength; i++) {
            customTextInput.push(
                <TextInput
                    ref={i}
                    style={styles.textInputStyle}
                    maxLength={1}
                    underlineColorAndroid='transparent'
                    keyboardType='numeric'
                    returnKeyType='next'
                    placeholder='.'
                    onChangeText={text => {
                        if (text.trim().replace(/\s+/g, ''.length !== 0)) {
                            this.changeFocusToNext(i);
                        } else {
                            this.changeFocusToPrevious(i);
                        }
                    }}
                />
            );
        }

        return (
            <View style={styles.containerStyles}>
                <View style={{flexDirection: 'row', paddingLeft: 15, paddingRight: 15}}>
                    {customTextInput}
                </View>
            </View>
        );
    }
}

const styles = {
    containerStyles: {
        width: 196,
        height: 48,
        marginTop: 100,
        borderRadius: 4,
        alignSelf: 'center',
        backgroundColor: '#eff1f4'
    },
    textInputStyle: {
        width: 28,
        height: 32,
        fontSize: 24,
        marginTop: 8,
        marginBottom: 8,
        paddingTop: 0,
        paddingBottom: 0,
    }
}

export default otpandcvv;