import-waiting-view.js

YUI.add("import-waiting-view", (function(Y) {

  var prototypeOptions = {
    initializer: function() {
      console.log('Initialized');
      this.publish('finished', {
        broadcast: true,
        fireOnce: true
      })
    },
    render: function() {
      this.get('container');
      this.fire('finished');
      return this;
    }
  };

  Y.namespace("BMP").ImportWaitingView = Y.Base.create("import-waiting-view", Y.View, [], prototypeOptions, {});

}), "0.0.1", { requires: ["base", "node", "get", "view", "handlebars"] });

index.html

<div id="demo"></div>

<script type="text/javascript">
  YUI().use('import-waiting-view', function (Y) {

    iwv = new Y.BMP.ImportWaitingView();
    iwv.render();

    Y.one('#demo').on('import-waiting-view:finished', function (e, f, g) { console.log(e, f, g) })

  });
</script>