Is There An Html5 Tag To Signify An Article Preview?

The description for an article element read: The article element represents a component of a page that consists of a self-contained composition in a document, page, application,

Solution 1:

There is no HTML5 tag specifically for preview excerpts.

Arguably, a summary of an article is a self-contained, potentially-reusable/syndicate-able bit of content, so you’d probably be fine using <article> for it.

Otherwise, <div> is always fine, although you might consider <section> or a list depending on the context.

To mark up the actual preview text, you could use <blockquote>, as you’re quoting the article.

Solution 2:

nav may be come handy, but it risks becoming overkill, as it creates a section in the outline. One may also consider using figure, especially if the excerpt also has a thumbnail.