File Upload Validation 5 component design & features
This file upload example uses the diceui FileUpload component with the onFileValidate callback for custom validation logic. It demonstrates filename validation preventing spaces, custom size limits, and error display using Alert components. The validation runs before file acceptance and provides specific error messages.
Custom validation enables business-specific rules beyond standard file type and size checks, such as naming conventions, content validation, or integration with external validation services. This pattern appears in enterprise systems, content management platforms, or applications with strict file requirements.