gistfile1.js

MilestoneSet = Backbone.Collection.extend({
  model: MilestoneModel,
  
  initialize: function() {
    this.bind('add', function(model) {
      new ProjectView({ model: model });
    });
  }
});

Milestones = new MilestoneSet();

Milestones.add({id: 1, name: 'Initial research', model: window.project, time: '60h'}, {silent: true});