$('#container').jstree({ "core" : { "check_callback" : true }, "plugins" : ["unique", "dnd"] });
<div id="container"> <ul> <li data-jstree='{"opened":true, "type":"demo"}'>Root node <ul> <li>b</li> <li>a</li> </ul> </li> <li data-jstree='{"opened":true, "type":"demo"}'>Root node <ul> <li>b</li> <li>a</li> </ul> </li> </ul> </div>