javascript - React Native: How to make format card expiration with / using <TextInput/>?

Javascript - React Native: How to make format card expiration with / using <TextInput/>?

To format the card expiration date with a slash (/) using <TextInput/> in a React Native application, you can utilize the onChangeText event handler to dynamically format the input as the user types. Here's how you can achieve this:

import React, { useState } from 'react'; import { View, TextInput, StyleSheet } from 'react-native'; const ExpiryInput = () => { const [expiry, setExpiry] = useState(''); const formatExpiry = (text) => { // Remove any non-numeric characters const formattedText = text.replace(/[^0-9]/g, ''); // Format the expiry date with a slash after the first two digits if (formattedText.length > 2) { return formattedText.slice(0, 2) + '/' + formattedText.slice(2); } return formattedText; }; const handleExpiryChange = (text) => { const formattedExpiry = formatExpiry(text); setExpiry(formattedExpiry); }; return ( <View> <TextInput style={styles.input} value={expiry} placeholder="MM/YY" keyboardType="numeric" maxLength={5} onChangeText={handleExpiryChange} /> </View> ); }; const styles = StyleSheet.create({ input: { height: 40, borderColor: 'gray', borderWidth: 1, paddingHorizontal: 10, }, }); export default ExpiryInput;

In this example:

  • We define a component ExpiryInput that renders a TextInput.
  • We use the useState hook to maintain the state of the input value (expiry).
  • The formatExpiry function is used to dynamically format the input as the user types. It removes any non-numeric characters and adds a slash after the first two digits.
  • The handleExpiryChange function is called whenever the input value changes. It formats the input value using the formatExpiry function and updates the state accordingly.
  • We apply the handleExpiryChange function to the onChangeText event of the TextInput component.
  • The TextInput component is styled with a border and padding for better appearance.

With this setup, the card expiration date will be automatically formatted with a slash (/) as the user types.

Examples

  1. "JavaScript format card expiration date regex"

    Description: This query seeks a regular expression (regex) solution to format the expiration date of a card in JavaScript. Regex can help validate and format the input in the desired format.

    // Regex to format card expiration date (MM/YYYY) const formatExpirationDate = (input) => { return input.replace( /^(0[1-9]|1[0-2])\/?([0-9]{4}|[0-9]{2})$/, (match, month, year) => `${month}/${year}` ); };

  2. "JavaScript input mask for card expiration date"

    Description: This query aims to find a JavaScript solution for creating an input mask specifically tailored for formatting card expiration dates. An input mask guides users to input data in a specific format.

    // Input mask for card expiration date (MM/YYYY) const addExpirationDateMask = (input) => { // Assuming input is a reference to the input element input.addEventListener('input', function (event) { let value = event.target.value.replace(/\D/g, '').substring(0, 6); value = value.replace(/^(\d{2})(\d)/g, '$1/$2'); input.value = value; }); };

  3. "JavaScript format card expiry using TextInput"

    Description: This query focuses on formatting card expiration dates using the <TextInput> component in JavaScript. It seeks an implementation using React Native's TextInput for formatting user input.

    // React Native: Format card expiry using TextInput import React, { useState } from 'react'; import { TextInput } from 'react-native'; const ExpiryInput = () => { const [expiry, setExpiry] = useState(''); const handleExpiryChange = (input) => { const formattedExpiry = formatExpirationDate(input); setExpiry(formattedExpiry); }; return ( <TextInput value={expiry} onChangeText={handleExpiryChange} placeholder="MM/YYYY" maxLength={7} /> ); };

  4. "JavaScript format credit card expiration React Native"

    Description: This query targets formatting credit card expiration dates specifically in a React Native environment. It looks for a solution tailored to the framework's syntax and conventions.

    // React Native: Format credit card expiration import React, { useState } from 'react'; import { TextInput } from 'react-native'; const ExpiryInput = () => { const [expiry, setExpiry] = useState(''); const handleExpiryChange = (input) => { const formattedExpiry = input.replace( /^(0[1-9]|1[0-2])\/?([0-9]{4}|[0-9]{2})$/, (match, month, year) => `${month}/${year}` ); setExpiry(formattedExpiry); }; return ( <TextInput value={expiry} onChangeText={handleExpiryChange} placeholder="MM/YYYY" maxLength={7} /> ); };

  5. "React Native input mask for card expiration date"

    Description: This query seeks a solution within the React Native ecosystem for implementing an input mask specifically designed for card expiration dates. React Native's TextInput component is often used for such implementations.

    // React Native: Input mask for card expiration date import React, { useState } from 'react'; import { TextInput } from 'react-native'; const ExpiryInput = () => { const [expiry, setExpiry] = useState(''); const handleExpiryChange = (input) => { let value = input.replace(/\D/g, '').substring(0, 6); value = value.replace(/^(\d{2})(\d)/g, '$1/$2'); setExpiry(value); }; return ( <TextInput value={expiry} onChangeText={handleExpiryChange} placeholder="MM/YYYY" maxLength={7} /> ); };

  6. "React Native format card expiry TextInput"

    Description: This query focuses specifically on formatting card expiration dates within a React Native application using the TextInput component. It looks for a solution tailored to React Native's syntax.

    // React Native: Format card expiry using TextInput import React, { useState } from 'react'; import { TextInput } from 'react-native'; const ExpiryInput = () => { const [expiry, setExpiry] = useState(''); const handleExpiryChange = (input) => { const formattedExpiry = formatExpirationDate(input); setExpiry(formattedExpiry); }; return ( <TextInput value={expiry} onChangeText={handleExpiryChange} placeholder="MM/YYYY" maxLength={7} /> ); };

  7. "React Native TextInput mask for credit card expiry"

    Description: This query focuses on implementing an input mask specifically for credit card expiration dates within a React Native application. It looks for a solution using the TextInput component in React Native.

    // React Native: TextInput mask for credit card expiry import React, { useState } from 'react'; import { TextInput } from 'react-native'; const ExpiryInput = () => { const [expiry, setExpiry] = useState(''); const handleExpiryChange = (input) => { let value = input.replace(/\D/g, '').substring(0, 6); value = value.replace(/^(\d{2})(\d)/g, '$1/$2'); setExpiry(value); }; return ( <TextInput value={expiry} onChangeText={handleExpiryChange} placeholder="MM/YYYY" maxLength={7} /> ); };

  8. "React Native format card expiration date TextInput"

    Description: This query is about formatting card expiration dates using the TextInput component within a React Native application. It seeks a solution tailored to React Native's conventions.

    // React Native: Format card expiration date using TextInput import React, { useState } from 'react'; import { TextInput } from 'react-native'; const ExpiryInput = () => { const [expiry, setExpiry] = useState(''); const handleExpiryChange = (input) => { const formattedExpiry = formatExpirationDate(input); setExpiry(formattedExpiry); }; return ( <TextInput value={expiry} onChangeText={handleExpiryChange} placeholder="MM/YYYY" maxLength={7} /> ); };

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