ESRI JS API : extend with mixins

Question

Hello,

Is there any working example for extending a class with mixin ?

According to the documentation, "Extending multiple classes is deprecated at 4.13". So I try to migrate a class extending accessor and evented. I used to have this piece of code in my class:

Implementing Accessor | ArcGIS API for JavaScript 4.13

import Evented = require("dojo/Evented");

import Accessor = require("esri/core/Accessor");

import { subclass, declared } from "esri/core/accessorSupport/decorators";

interface Collection extends Evented {}

@subclass("esri.guide.Collection")

class Collection extends declared(Accessor, Evented) { }

But following the new example, I don't quite understand:

Implementing Accessor | ArcGIS API for JavaScript 4.13

I do not wan't to define my own "emit" and "on" functions but rather use the one from dojo evented.

To me both examples are not equivalent. It would be nice to have a more detailed example !

Thanks

NicolasGIS · Answer

Interesting ! Now that you say it, I realize it

Many thanks for these explanations

YannCabon · Answer

The whole API is barely based on dojo now and declare is just one of the last things to stop using from dojo.

NicolasGIS · Answer

Many thanks for this explanation. I now understand the reason. Maybe when core will get more stable then ! Out of curiosity, what will be the main advantage of getting rid of "declare" as the whole API is based on dojo ?