Elements adds ng-version attribute to every Angular element on the page

[vikerman]

Currently every top-level custom element tag gets a ng-version attribute

Ex.

...
<my-element name="Hello World!!" ng-version="6.0.0-rc.1" >
  <div>Hello World!!</div>
</my-element>
...

For server side rendered custom elements this adds extra bytes for every custom element on the page.

[robwormald]

cc @StephenFluin

[artem-galas]

I would like to handle this.
Could you please explain what are expected behaviour?

[gkalpak]

Confirming this still happens in v9. Not sure whether should be addressed on ngUniversal side or in core (or elements).

[CaerusKaru]

@gkalpak My guess is that it's primarily an elements issue in terms of how it integrates with core. There is no specific code in platform-server that dictates how ng-version is added to elements.

[CaerusKaru]

Seems like the issue is here. The root element is always set as the custom element being initialized. Maybe we could provide a custom implementation for SSR that sets this to null.

[gkalpak]

Not sure what the correct fix is, but afaict setting to null will have other unwanted side-effects (such as creating a new element for the component).