Header row isn't visible with rowspan

Webix JS
#1

Example:

webix.ui({
    view: "datatable",
    columns: [
        {id: "c1", header: ["label1"], rowspan: 3},
        {id: "c2", header: [{text: "label2", rowspan: 2}, {text: "label3"}]}
    ],
});

We see table with 2 columns: “label1” and “label2”. And… 1 row. That’s all. There is no “label3”.

And if we do something like this

webix.ui({
    view: "datatable",
    columns: [
        {id: "c1", header: ["label1"], rowspan: 3},
        {id: "c2", header: [{text: "label2", rowspan: 2}, {text: "label3"}]},
        {header: ['a', 'b', 'c']}
    ],
});

we’ll see this error “Uncaught TypeError: Cannot set property ‘rowspan’ of null” only.

#2

You need to set a null value for cells that are included in rowspan

{id: "c2", header: [{ text: "label2", rowspan: 2}, null, "label3" ] },

http://webix.com/snippet/51f6b902
http://webix.com/snippet/05c5246e

#3

Ok. Thx