Edit in JSFiddle

<div id='container'>
  <h1 style="color: {{title_color}}">
    {{title}}
  </h1>
  <div ba-repeat="{{c :: colors}}">
    <button ba-tap="title_color = c.color">Color {{c.color}}</button>
  </div>
</div>
var mainDynamic = new BetaJS.Dynamics.Dynamic({
  element: $("#container"),
  collections: {
    colors: [{ color: "blue" }, { color: "red" }]
  },
  attrs: {
    title: "Hello World"
  }
});
mainDynamic.activate();