Custom Validation

Custom validation is a way to ensure that data entered into a system meets specific, tailored criteria beyond standard checks. For example, if you collect a phone number, custom validation can verify it follows a particular format or length you require. It allows developers to define unique rules suited to their application's needs, ensuring the information submitted is accurate and appropriate. Think of it as setting personal guidelines for data entry, helping to prevent errors and maintain data quality tailored to your specific requirements.