Can I use slots in my custom-built ionic components?

Thanks again. I have read this article, but have not found it helpful. It does, however, contain the following sentences: " NOTE: Remember that this is a feature of web components, you would not be able to use this directly in your own components in an Ionic/Angular application. If you are using Stencil to build your own web components, then you could use this feature." Unfortunately, it doesn’t elaborate.