Marionette.js. CollectionView's. childViewOptions

You can also specify the `childViewOptions` as a function, if you need to calculate the values to return at runtime.

by marionettejs

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.2/jquery.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.3/underscore-min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/backbone.js/1.3.3/backbone-min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/backbone.radio/2.0.0/backbone.radio.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/backbone.marionette/3.0.0/backbone.marionette.js"></script>

JavaScript

const myCollection = new Backbone.Collection([{}]);

const ChildView = Mn.View.extend({
	template:false,
  initialize: function(options) {
    console.log(options.foo); // => "bar"
    console.log(options.childIndex); // => "0"
  }
});

const CollectionView = Mn.CollectionView.extend({
	collection: myCollection,
  childView: ChildView,
  childViewOptions: function(model, index) {
    // do some calculations based on the model
    return {
      foo: 'bar',
      childIndex: index
    }
  }
});

const collectionView = new CollectionView();
collectionView.render();