SP.FieldChoice.editFormat property (sp.js)
Determines whether to display the choice field as option buttons (also known as "radio buttons") or as a drop-down list.
Applies to: apps for SharePoint | SharePoint Foundation 2013 | SharePoint Server 2013
var value = SP.FieldChoice.get_editFormat ()
var value = SP.FieldChoice.set_editFormat ()
Return value
Type: SP.ChoiceFormatType