Anchor tag does not contain href property

[jesskfullwood]

The href attribute is inherited by the <a> tag via HTMLHyperlinkElementUtils as per
here. However for the life of me I can't find the href getter anywhere in the docs, nor any mention of HTMLHyperlinkElementUtils. href is of course the most useful property of <a>.

[alexcrichton]

Thanks for the report! Looking into this I believe it's a duplicate of #893, and HTMLHyperlinkElementUtils is indeed on that list.

We may be able to fix this issue specifically though by manually removing the attribute perhaps and/or switching it to a partial interface? The best fix though is to probably just fix the codegen for webidl to not fully ignore these tags!

[marienz]

Although web-sys now generates bindings for HTMLHyperlinkElementUtils, I still cannot figure out how to actually use them. Calling a.dyn_ref::<HTMLHyperlinkElementUtils>() on an HTMLAnchorElement fails, and the methods from HTMLHyperlinkElementUtils are not present on HTMLAnchorElement.

https://html.spec.whatwg.org/multipage/semantics.html#htmlhyperlinkelementutils (which
HTMLHyperlinkElementUtils.webidl links to as its origin) has interface mixin HTMLHyperlinkElementUtils. mixin is missing from the HTMLHyperlinkElementUtils.webidl in web-sys. I tried adding mixin and that seems to work: it adds a working set_href to HTMLAnchorElement.

Is this a problem with the .webidl file, or am I overlooking a different way of using HTMLHyperlinkElementUtils?

[alexcrichton]

This is probably a case where we can just edit the webidl directly, especially if it's officially included upstream!

@marienz mind sending a PR?