View elements also support a few attributes that allow views to dynamically change their appearance or behavior, depending on field values. We may have on-change events, which are able to change values on other fields while editing data on a form, or have fields that are mandatory or visible only when certain conditions are met.
Dynamic view elements
On-change events
The on-change mechanism allows us to change values in other form fields when a particular field is changed. For example, the on-change on a product field can set the price field to a default value whenever the product is changed.
In older versions, the on-change events were defined at the view level, but since version 8.0 they are defined directly on the model...
