HTML inited tree: Can I open the root element on load?

I am a newbie using the free version of the tree, and using the html initialization option. When a page opens, can I display the tree with the root element opened?

There is no way to define such behavior as part of HTML configuration
You can try to use mixed design, when HTML structure holds all data but initialization of tree triggered by script

<div id=“someHTMLID” //css class not specified