Short answer: Many Jains do not eat brinjal (eggplant), but some do. It depends on how strictly they follow Jain food rules and their local tradition.

Reason in Jain dharma (simple way):

• Main principle is ahimsā (non‑violence).
• Brinjal has many tiny seeds and often very small insects/worms can be present inside.
• Because of this, many strict Jains classify it as involving more himsā, so they avoid it completely, especially:

- during Paryushan / Das Lakshan / Chaturmās - in families or sanghs that follow very strict food rules

• Some less‑strict Jain families do eat brinjal, but:

- they cut it fully, check carefully for worms/insects, - and may avoid it during special vrat, Paryushan, etc.

No major Digambar–Shwetambar doctrinal difference is specifically about brinjal; it is more about level of strictness and local maryādā (custom).

So:

• If you follow a strict Jain maryādā → usually avoid brinjal.
• If your family/sangh allows it → it is often eaten with careful checking and cleaning, and usually avoided on special days.

For more on Jain food rules you can read here: Jain food basics and restrictions