Phone Number Text Input Formatter

This is a Flutter package built to provide phone number formatting functionality during text input. It's a key helper in creating phone number input fields that need to restrict and validate user input in a formatted manner.

Features

• Zero dependency
• Efficiently formats the phone numbers on-the-fly, with better performance than regular expression-based solutions.
• You can customize the format according to your needs, giving you more flexibility and control.
• Comes with pre-implemented popular international and national phone number formats.

Usage

Format the phone number using all available international formats:

TextField(
  keyboardType: TextInputType.phone,
  inputFormatters: [
    FilteringTextInputFormatter.allow(RegExp(r'[0-9,+]')),
    const PhoneNumberTextInputFormatter(prefix: '+'),
  ],
)

Format the US phone number in international format:

TextField(
  keyboardType: TextInputType.phone,
  inputFormatters: [
    FilteringTextInputFormatter.allow(RegExp(r'[0-9,+]')),
    const NationalPhoneNumberTextInputFormatter.US(prefix: '+'),
  ],
)

Custom phone number format:

TextField(
  keyboardType: TextInputType.phone,
  inputFormatters: [
    FilteringTextInputFormatter.allow(RegExp(r'[0-9,+]')),
    const NationalPhoneNumberTextInputFormatter(
      prefix: '+',
      countryCode: '28',
      groups: [
        (length: 4, leading: ' [', trailing: '] '),
        (length: 3, leading: '', trailing: '-'),
        (length: 3, leading: '', trailing: ' '),
      ],
    ),
  ],
)