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lang-html
<h1>"rule" and has had a warning since HTML5.0 along with open bugs to fix it. 2. See the blog post about the dialog: "removed the role=”document” from the contents of the window. This was originally inserted to deal with the way NVDA interacted with role=”dialog”, but that issue has since been resolved in NVDA."<hgroup>(which has no support) and leans on the Document Outline Algorithm which has never been implemented. So if you are supporting users, ignore that part of the spec. If you are targeting code compliance, go nuts. Ref: adrianroselli.com/2016/08/…, codepen.io/stevef/post/a-decade-of-heading-backwardsdialogdoes however not appear to be a sectioning content or section root element, which is inconsistent and a bit odd given it can be useful to give dialogs a heading. I can not find any WHATWG mention of it being "sectioning root" anymore, but it used to say this in w3 specifications: w3.org/TR/2018/WD-html53-20180809/… Not sure if this means we should avoid using headings entirely in dialogs, and perhaps use something else, like a more neutralpordivhowever.