W3C Validator warning: Article lacks heading. Consider using h2-h6 elements to add identifying headings to all articles

[henry.wright]

File: wp-includes/class-walker-comment.php

Screenshot incoming.

[henry.wright]

Just to add, I believe you need to enable theme support for html5 to see this.

[davidakennedy]

This could potentially be improved, but changing the markup could cause issues with current themes. So this needs to be discussed more.

[audrasjb]

Discussed today during accessibility team meetup.

William Patton send us a stat from theme repository:
About 30% of themes in directory use HTML5 comments (and then, <article> HTML element).

Seems to be difficult to manage in terms of backward compatibility…

We can later ask Theme Review Team to get an accurate figure on how many of those themes are targeting <article> inside of comments for styling as well so we can get a decent figure of impact.

[noisysocks]

This came up in ​https://github.com/WordPress/gutenberg/issues/8253 too as the Latest Comments block uses the markup that Core uses for comments.

If a decision is made here to change the markup, then let's be sure to modify it in the Latest Comments block as well.