Subject of the feature

Add ids to headings for deep linking.

Problem

Most markdown implementations automatically add a slugified id to all headings (h1–h6) for deep-linking support. I would expect MDX to do the same.

Expected behavior

Markdown such as ## More information should render as <h2 id="more-information">More information</h2>. This way, links with this hash deep link to the heading (e.g. https://example.com/foo#more-information).

Alternatives

Similar behavior can be accomplished by creating custom components that add the id, but this requires additional configuration.