addItem

adds a new item into TreeView

id	string|number	the item's id
text	string	the item's text
parentId	string|number	the parent's id
index	number	the item's index

Example

var myTreeview = new dhtmlXTreeView({
    // treeview conf here
});
 
// adding the root item
myTreeView.addItem("1", "Books"); // id, text
 
// adding a first-level child
myTreeView.addItem("2", "Turned at Dark", "1"); // id, text, pId

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