Question 1

How to add a custom validator in NG Dynamic Forms?

Accepted Answer

Define your validator function, provide it via NG_VALIDATORS, and reference it in the model's validators object. For production, also add it to DYNAMIC_VALIDATORS using a Map to avoid minification issues.

Question 2

NG Dynamic Forms vs ng-formly: which is better for Angular?

Accepted Answer

NG Dynamic Forms excels with tight integration to specific UI libraries like Material, offering more control over component rendering. ng-formly is more abstract and framework-agnostic, better for highly dynamic forms without UI constraints.

Question 3

How to handle dynamic form arrays in NG Dynamic Forms?

Accepted Answer

Use DynamicFormArrayModel with a groupFactory function, then manipulate it via DynamicFormService methods like addFormArrayGroup. Always call detectChanges() after updates to reflect changes in the UI.

Question 4

Can I use NG Dynamic Forms with Angular Material?

Accepted Answer

Yes, install the @ng-dynamic-forms/ui-material package and its peer dependencies, then import DynamicFormsMaterialUIModule. The library provides pre-styled components aligned with Material Design.

Question 5

How to export a form model to JSON in NG Dynamic Forms?

Accepted Answer

Models are JSON-serializable by default—use JSON.stringify() on your form model array. Restore it later with DynamicFormService.fromJSON(), which parses JSON back into functional models.

Question 6

What UI libraries does NG Dynamic Forms support?

Accepted Answer

It supports Material, ngx-bootstrap, NG Bootstrap, Foundation, Ionic, PrimeNG, and a basic UI package. However, control compatibility varies, so check the table for specific component support.

Dynamic Forms

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