validation
Form validation and error message handling
Learn how to implement automatic attribute interpolation in i18next validation error messages similar to Laravel's :attribute placeholder system.
Discover why Day.js strict ISO 8601 parsing fails for valid strings like 2024-03-10T15:30:00Z. Learn reliable validation using built-in parsers, customParseFormat, regex, UTC plugin, and code examples for robust date handling.
Learn how to reliably focus a jQuery Timepicker input field like #Period1TimeFrom when jQuery validation fails. Use setTimeout, event hooks, and custom methods to fix focus issues after form errors.
Resolve Oxwall form validation failing on PHP 8.3 when pasting text. 'Please fill the form properly' error due to invisible Unicode characters. Robust server-side fixes, code examples for RequiredValidator, trim/mb_strlen issues, and client-side paste handlers.
Why .NET Minimal API validation breaks with generic endpoints in different assemblies. Source generator limits, resolver scanning issues, and workarounds like custom filters and FluentValidation for modular CQRS setups.