Prop

prop is a important concept of Vue Component. More Detail.

Name	Type	Default	Necessary	Description
id	String	''	N	It will be add to DOM attribute of the form.
title	String	''	N	Title of the form, you can use slot[name='title'] either.
labelWidth	String	4	N	Label's width ranged from 1 to 23, which is using ElementUI Layout.More Detail
elements	Array	[]	Y	Elements' Config, the data source of the form.