Which @angular/* package(s) are relevant/related to the feature request?

platform-browser

Description

It seems that is not possibile to use builtin custom elements (is attribute) inside an Angular template.
The createElement method does not accept options and the is attribute is not handled.

Proposed solution

Add special handling for the is attribute in order to correctly instantiate builtin custom elements.

Alternatives considered

Builtin custom elements is part of the HTML living standard and it actually has not alternatives. If a third party component is distributed as custom builtin element, it cannot be used in Angular.