gistfile1.js

var BaseView = Backbone.View.extend({
  someMethod: function() {
    console.info("super");
  }
});

var MyView = BaseView.extend({
  someMethod: function() {
    // call this method from parent
    MyView.prototype.someMethod.call(this);
    console.info("child");
  }
});

var myView = new MyView();
myView.someMethod(); // the output will be super and then child