A flutter package which provides the validation and input format functionalities for the input fields.

Features

• Provides validation for the input types

  1. text
  2. password
  3. email
  4. phone
  5. url

• Provides various input formats

Getting started

Add the text_field_validator package into pubspec.yaml file start working. import the package as import 'package:text_field_validator/text_field_validator.dart';

Usage

Container(
    padding: const EdgeInsets.symmetric(horizontal: 16),
    child: Center(
        child: ListView(
            children: <Widget>[
            Text("Validators",
                style: Theme.of(context).textTheme.headlineMedium),
            const SizedBox(height: 10),
            TextFormField(
                validator: (value) {
                    return TextFieldValidator.textValidator(
                    value: value,
                    minLength: 2,
                    maxLength: 5,
                    );
                },
                autovalidateMode: AutovalidateMode.onUserInteraction),
            const SizedBox(height: 20),
            TextFormField(
                validator: (value) {
                return TextFieldValidator.passWordValidator(
                    password: value,
                    minPasswordLength: 8,
                );
                },
                autovalidateMode: AutovalidateMode.onUserInteraction,
            ),
            TextFormField(
                validator: (value) {
                return TextFieldValidator.urlValidator(
                    url: value,
                );
                },
                keyboardType: TextInputType.url,
                autovalidateMode: AutovalidateMode.onUserInteraction,
            ),
            const SizedBox(height: 30),
            Text("Input Formatters",
                style: Theme.of(context).textTheme.headlineMedium),
            const SizedBox(height: 10),
            TextFormField(
                decoration:
                    const InputDecoration(labelText: 'Adhar Input Formatter'),
                inputFormatters: InputFormatter.adharFormatter()),
            const SizedBox(height: 20),
            TextFormField(
                decoration:
                    const InputDecoration(labelText: 'PAN Input Formatter'),
                inputFormatters: InputFormatter.panFormatter(),
            ),
            const SizedBox(height: 20),
            TextFormField(
                decoration:
                    const InputDecoration(labelText: 'Date Input Formatter'),
                inputFormatters: InputFormatter.dateFormatter(
                FormatterEnum.hhmmssMMDDYYYY24,
                ),
            ),
            const SizedBox(height: 20),
            TextFormField(
                decoration: const InputDecoration(
                    labelText: 'Alphabet Input Formatter'),
                inputFormatters: InputFormatter.alphabetFormatter(),
            ),
            const SizedBox(height: 20),
            TextFormField(
                decoration:
                    const InputDecoration(labelText: 'Credit Card Formatter'),
                keyboardType: TextInputType.number,
                inputFormatters: InputFormatter.creditCardNumberFormatter(),
            ),
            const SizedBox(height: 20),
            TextFormField(
                decoration:
                    const InputDecoration(labelText: 'Phone Number Formatter'),
                keyboardType: TextInputType.phone,
                inputFormatters: InputFormatter.phoneNumberFormatter(),
            ),
            const SizedBox(height: 20),
            TextFormField(
                decoration: const InputDecoration(
                    labelText: 'Decimal Number Formatter'),
                keyboardType:
                    const TextInputType.numberWithOptions(decimal: true),
                inputFormatters: InputFormatter.decimalFormatter(),
            ),
            const SizedBox(height: 20),
            TextFormField(
                decoration: const InputDecoration(
                    labelText: 'Integer Number Formatter'),
                keyboardType: TextInputType.number,
                inputFormatters: InputFormatter.numberFormatter(),
            ),
            ],
        ),
    ),
),

Added Input Formatters

1. Date and Time Input Formatter

• New Enum:
  Added FormatterEnum to specify common date and time formats (e.g., DD-MM-YYYY, YYYY-MM-DD HH:MM:SS).

• Flexible Separators:
  The dateFormatter now accepts two parameters:

  • dateSeparator (e.g., -, /)
  • timeSeparator (e.g., :, .)
    This allows you to customize the format for both date and time parts.

• Supports Date & Time:
  The formatter supports both date and time fields, handling patterns with D, M, Y, H, and S (for day, month, year, hour, second).

• Usage Example:

  inputFormatters: InputFormatter.dateFormatter(
    FormatterEnum.ddMMyyyyhhmmss,
    dateSeparator: '/',
    timeSeparator: '.',
  )
  // Result: DD/MM/YYYY HH.MM.SS
  

Input Formatters

This package provides a variety of input formatters for Flutter TextFormField and TextField widgets, making it easy to restrict and format user input.

Available Formatters

1. Aadhaar Formatter

Formats input as an Aadhaar number (e.g., XXXX XXXX XXXX).

inputFormatters: InputFormatter.adharFormatter(),

2. PAN Formatter

Formats input as a PAN (Permanent Account Number) in the structure: AAAAA9999A.

inputFormatters: InputFormatter.panFormatter(),

3. IFSC Code Formatter

Formats input as an IFSC (Indian Financial System Code) code, typically used for Indian bank branches.

inputFormatters: InputFormatter.ifscFormatter(),

4. Number Formatter

Allows only numeric input (digits only).

inputFormatters: InputFormatter.numberFormatter(),

5. Decimal Formatter

Allows numeric input with decimal points, useful for prices or measurements.

inputFormatters: InputFormatter.decimalFormatter(decimalRange: 2),

6. Alphabet Formatter

Allows only alphabetic input (letters only).

inputFormatters: InputFormatter.alphabetFormatter(),

7. Alphanumeric Formatter

Allows only alphanumeric input (letters and digits).

inputFormatters: InputFormatter.alphaNumericFormatter(),

8. Upper Case Formatter

Allows only upper-case alphabetic input.

inputFormatters: InputFormatter.upperCaseFormatter(),

9. Lower Case Formatter

Allows only lower-case alphabetic input.

inputFormatters: InputFormatter.lowerCaseFormatter(),

10. No Leading Space Formatter

Prevents leading spaces in the input.

inputFormatters: InputFormatter.noLeadingSpaceFormatter(),

11. No Double Space Formatter

Prevents occurrence of double spaces in the input.

inputFormatters: InputFormatter.noDoubleSpaceFormatter(),

12. Capitalize First Letter Formatter

Capitalizes the first letter of the input string.

inputFormatters: InputFormatter.capitalizeFirstLetterFormatter(),

13. Credit Card Number Formatter

Formats input to ensure it matches the structure of a credit card number (e.g., 1234-5678-9012-3456).

inputFormatters: InputFormatter.creditCardNumberFormatter(),

14. Phone Number Formatter

Formats the input to ensure it matches the structure of a phone number, including optional country code.

inputFormatters: InputFormatter.phoneNumberFormatter(),

15. Custom Pattern Formatter

Allows input formatting based on a custom pattern, where X represents a required digit.

inputFormatters: InputFormatter.customPatternFormatter('XXX-XXX-XXXX'),