Datatable - how to select 1st row onAfterLoad event?

How to select in Datatable the 1-st row onAfterLoad event?
Tried “getFirstId()”, does not seems to work.
http://webix.com/snippet/37ae7199

I tried it locally, the following code works:

var id = this.getFirstId();
this.select(id);
webix.message("First is "+id);

Don’t know why, but it does not work, fails on

this.select(id);

http://webix.com/snippet/150674c0

Btw, how do you highlight javascript syntax?

Highlighting

//js code<br>

Thank you.

Re: http://webix.com/snippet/150674c0, is this something on my side?

Missed a vital thing in your configuration. You should have enabled selection for the datatable:

<datatable id="datatable" select="row" />

http://webix.com/snippet/633556b2

That fixed the issue. Thank you.