add

adds a new item to the grouplist

string add(object obj, [number index,string parentId] );

obj	object	the item object
index	number	optional, the position that the item will be added to (zero-based numbering)
parentId	string	optional, the parent id

string

ID of the newly added item

//inserts a new item into the parent with id='root'
grouplist.data.add({
    id:"item10", value:"NewItem"
}, 0, "root" );

Details

Grouplist items are added in the same way as Tree items. Read more in Tree Nodes Manipulations