Alert react native

import React, { useState } from "react";
import { View, StyleSheet, Button, Alert } from "react-native";

const App = () => {
  const createTwoButtonAlert = () =>
    Alert.alert(
      "Alert Title",
      "My Alert Msg",
      [
        {
          text: "Cancel",
          onPress: () => console.log("Cancel Pressed"),
          style: "cancel"
        },
        { text: "OK", onPress: () => console.log("OK Pressed") }
      ]
    );

  const createThreeButtonAlert = () =>
    Alert.alert(
      "Alert Title",
      "My Alert Msg",
      [
        {
          text: "Ask me later",
          onPress: () => console.log("Ask me later pressed")
        },
        {
          text: "Cancel",
          onPress: () => console.log("Cancel Pressed"),
          style: "cancel"
        },
        { text: "OK", onPress: () => console.log("OK Pressed") }
      ]
    );

  return (
    <View style={styles.container}>
      <Button title={"2-Button Alert"} onPress={createTwoButtonAlert} />
      <Button title={"3-Button Alert"} onPress={createThreeButtonAlert} />
    </View>
  );
}

Alert react native

function getCardType (number) {
  const numberFormated = number.replace(/\D/g, '')
  var patterns = {
    VISA: /^4[0-9]{12}(?:[0-9]{3})?$/,
    MASTER: /^5[1-5][0-9]{14}$/,
    AMEX: /^3[47][0-9]{13}$/,
    ELO: /^((((636368)|(438935)|(504175)|(451416)|(636297))\d{0,10})|((5067)|(4576)|(4011))\d{0,12})$/,
    AURA: /^(5078\d{2})(\d{2})(\d{11})$/,
    JCB: /^(?:2131|1800|35\d{3})\d{11}$/,
    DINERS: /^3(?:0[0-5]|[68][0-9])[0-9]{11}$/,
    DISCOVERY: /^6(?:011|5[0-9]{2})[0-9]{12}$/,
    HIPERCARD: /^(606282\d{10}(\d{3})?)|(3841\d{15})$/,
    ELECTRON: /^(4026|417500|4405|4508|4844|4913|4917)\d+$/,
    MAESTRO: /^(5018|5020|5038|5612|5893|6304|6759|6761|6762|6763|0604|6390)\d+$/,
    DANKORT: /^(5019)\d+$/,
    INTERPAYMENT: /^(636)\d+$/,
    UNIONPAY: /^(62|88)\d+$/,
  }
  for (var key in patterns) {
    if (patterns[key].test(numberFormated)) {
      return key
    }
  }
}

console.log(getCardType("4539 5684 7526 2091"))
 Run code snippet

Source: stackoverflow.com

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