Invalid

Form / Field invalid flags are calculate on each relevant action such as init, change value and change data. Invalid is a result of both field's required and validators.

This does not need to be passed by default in the initial form model json. You can pass it in the initial form model json, if you are currently loading a form model from persist model (i.e you saved the form model before user did page reload - and want to reload the form with the exact same model state that it was before the refresh)

Field Invalid

model.fields.someField.invalid - boolean. Flag that reflects if the field is invalid. Each field can define a set of validators (field.validators). A field is invalid if at least one of its validators failed.

Form Invalid

model.invalid - boolean. Flag that reflects if the form model is invalid. Form is invalid if at least one field is invalid. Excluded fields are not included in this calculation.

Example

Disable a save button when model is invalid.

<Button disabled={model.invalid}>Save</Button>