Alphanumeric / Numeric / Email Validation

These validation rules ensure that user input adheres to the correct data type. You can enforce that fields accept only letters and numbers, numeric values, or email addresses.

Alphanumeric Validation#

Ensures the input contains only letters and numbers (no special characters or spaces).

Example Errors:

1. Invalid input for field “Username” Invalid entry: "user@123" Error: Username can only contain letters and numbers.

Numeric Validation#

Ensures that the input contains only numbers.

Example Errors:

1. Invalid input for field “Phone Number” Invalid entry: "123-456-7890" Error: Phone number must contain only numbers, no dashes or spaces.

Email Validation#

Ensures that the input follows a valid email format (e.g., user@example.com).

Example Errors:

1. Invalid input for field “Email Address” Invalid entry: "useratexample.com" Error: Email address is not valid.

Best Practices#

• For alphanumeric fields, ensure that only relevant characters are allowed.
• For numeric fields, restrict to digits only.
• For email fields, validate that the input contains both @ and ., ensuring a proper email format.