Webix

HTML

<link rel="stylesheet" href="http://cdn.webix.com/edge/webix.css">
<script src="http://cdn.webix.com/edge/webix.js"></script>

JavaScript

webix.ui({
  view: "tree",
  data:[{id:"root", value:"Ready"}],
  ready: function() {
    alert('ready');
  }
});

console.log('webix:', webix);