var instance = new Vintasoft.Imaging.Pdf.WebPdfInteractiveFormFieldJS(document, name);

var value; // Type: boolean
value = instance.get_IsTerminalField();

function get_IsTerminalField() : boolean;

A value indicating whether the field is terminal field (leaf node in fields tree). true - the field is terminal field (leaf node in fields tree); false - the field is NOT terminal field.