If you have duplicate sub headings the link generated for them in the table of contents will just lead to the first match it finds. For instance, if you had:
# A Heading !heading
## A Subheading !heading
# Another Heading !heading
## A Subheading !heading
The table of contents generates the link based on the heading text. So both links for A Subheading would be the first subheading content.
If you have duplicate sub headings the link generated for them in the table of contents will just lead to the first match it finds. For instance, if you had:
The table of contents generates the link based on the heading text. So both links for
A Subheadingwould be the first subheading content.