backbone.js CustomModel with View

custom-model-with-view.js

var customModel = new CustomModel();

var sampleView = new Backbone.View({
    model: customModel
});

custom-model.js

var CustomModel = Backbone.Model.extend({
    fetch: function(){
        
        this.trigger( "fetch", this );
    
        return Backbone.Model.prototype.fetch.apply( this, arguments );
    }
});