api.SVGPointList - cannot contain DOMPoint in browsers

MDN URL

https://developer.mozilla.org/en-US/docs/Web/API/SVGPointList

What specific section or headline is this issue about?

No response

What information was incorrect, unhelpful, or incomplete?

The SVGPointList interface represents a list of DOMPoint objects.

If I try to add a DOMPoint to SVGPointList in Firefox, I get this error:

Uncaught TypeError: SVGPointList.insertItemBefore: Argument 1 does not implement interface SVGPoint.

What did you expect to see?

I'm not sure... The issue is quite subtle. SVGPointList accepting DOMPoints is an SVG 2 feature, while SVG 2 is not in a very good place in general. It's definitely not surprising that some SVG 2 feature is missing from browsers. I think that the article should either list the gotchas or document both SVG 1.1 and SVG 2.0 behaviors, I'm not experienced enough with MDN practices to decide what's the proper way forward.

Do you have any supporting links, references, or citations?

No response

Do you have anything more you want to share?

No response

MDN metadata

Start with files/en-us/web/api/svgpointlist/index.md and compare its DOMPoint statement with the SVG 1.1 and SVG 2 behavior described in the issue. Confirm the relevant browser behavior, then update the article so the documented behavior and compatibility caveats are accurate; done means the DOMPoint guidance no longer contradicts Firefox.