alpha#

Built-in regex plugin for validating alphabetic characters.

Usage Scenarios#

• Form Validation: Validate text input contains only letters
• Data Sanitization: Ensure strings contain no numbers or special characters
• Username Validation: Verify usernames contain only alphabetic characters

Examples#

import { regex } from 'funtool';

// Basic validation
const isValid = regex.checker('abc').use('alpha').isValid();

// With error handling
const result = regex.checker('123').use('alpha');
if (!result.isValid()) {
  console.log('Input must contain only letters');
}

Pattern#

/^[a-zA-Z]+$/

Validation Rules#

• Must contain only letters (a-z, A-Z)
• No numbers, spaces, or special characters allowed
• Case insensitive (both upper and lower case accepted)

Error Message#

Returns false for invalid inputs without a specific message.