for CMS Custom functionalities,we can write custom Anguilla/JS code on relevant JS files for Classic UI. how to write same Custom Code logic in New UI?

for example:

 * @param {Tridion.Core.Event} event The event is the event fired from the <c>Tridion.Controls.Dropdown</c> control.
Tridion.Cme.Views.InsertCpDialog.prototype.onTemplateChange = function InsertCpDialog$onTemplateChange()
    // existing code
    // new code write here
  • 2
    Just saying that there is an officially supported way to extend the old UI without changing the original .js files…
    – Nuno Linhares
    Feb 21 at 20:41

1 Answer 1


Extending the new UI (known as Experience Space) is not yet supported. This functionality is expected to arrive in the next release, Tridion 10.

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