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

import NumberPlease from 'react-native-number-please';

const OrderPizza = () => {
  const initialValues = [{ id: 'pizza', value: 3 }];
  const [pizzas, setPizzas] = useState(initialValues);
  const pizzaNumbers = [{ id: 'pizza', label: '🍕', min: 0, max: 99 }];

  return (
    <View>
      <Text>I would like</Text>
      <NumberPlease
        pickers={pizzaNumbers}
        values={pizzas}
        onChange={(values) => setPizzas(values)}
      />
    </View>
  );
};

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

import NumberPlease from 'react-native-number-please';

const ItsYourBirthday = () => {
  const initialBirthday = { day: 16, year: 1970, month: 4 };
  const [birthday, setBirtday] = React.useState(initialBirthday);

  const { day, month, year } = birthday;

  const date = [
    { id: 'day', label: '', min: 0, max: 31 },
    { id: 'month', label: '', min: 0, max: 12 },
    { id: 'year', label: '', min: 1900, max: new Date().getFullYear() },
  ];

  const calculateAge = () => {
    const ageDifMs = Date.now() - new Date(year, month, day).getTime();
    const ageDate = new Date(ageDifMs);
    return Math.abs(ageDate.getUTCFullYear() - 1970);
  };

  return (
    <View style={styles.container}>
      <Text>When is your birthday?</Text>
      <NumberPlease
        pickers={date}
        values={birthday}
        onChange={(values) => setBirtday(values)}
      />
      <Text>You're {calculateAge()} years old</Text>
    </View>
  );
};