Function getDefaultValues

getDefaultValues(formMetaData, initialData?): JAttributeValueByName
JMap.Form.getDefaultValues

Returns the default data values of the form.

The result is an object where :
- key is the attribute id
- value the default value
Parameters
- formMetaData: JFormMetaData
  A JMap form metadata
- Optional initialData: JAttributeValueByName
  Initial data. If provided, it will set the default data then overwrite with initial values.
Returns JAttributeValueByName
a key/value object
Example
```
const form = ...
const defaultValues = JMap.Form.getDefaultValues(form)
```