What it means
Validation decides when edit rules run and what feedback users see when a value does not meet the expected rule.
Interaction guide
Validation data grid documentation
Validation shows when a value is checked and how the result appears. This demo uses info, warnings, and hard errors so the feedback stays easy to scan.
When to use it
Use blocking validation when bad data would break downstream logic or make the workflow impossible to complete safely. Use warning-style validation when users should keep moving but still need to see that a value deserves follow-up.
Implementation notes
Keep rules as close as possible to the business language the user already knows. Validation messages should explain what to fix, not just that something went wrong.
Relevant API
Start with validation.enabled, validation.mode, validation.validateOn, validation.validateDebounceMs, validation.validateOnVisibleChange, validation.validateVisibleOnly, validation.validateVisibleDebounceMs, validation.validateAllToken. Open the live API reference for types and defaults.