Unified testing environment for library versions.
Numeric input that allows a single decimal point.
Auto-formats 16-digit card numbers (XXXX-XXXX-XXXX-XXXX).
Simple time formatting (HH:MM).
Converts text to URL-friendly slug (lowercase, dashes).
Auto-formatting for Title Case, UPPERCASE, and lowercase.
Restrict input into English letters only (No numbers, No spaces, No symbols).
Formatting for Class/Year (e.g. 1/2).
Allows English (a-z) and Thai (ก-๙) characters and spaces.
Limits the number of characters allowed.
Restricts input to numeric characters only.
Auto-formats to standard mobile number pattern (XXX-XXX-XXXX).
Formats input as a standard 13-digit Thai ID card number.
Automatically adds comma separators for thousands.
Changes border color based on length (Red < 8, Green>= 8).