In Jain dharma, chocolate can be eaten only if it is suitable and non-violating to vows.

Generally:

• Plain chocolate without egg or alcohol is often acceptable for householders, but
• You should avoid chocolate that contains gelatin, egg, alcohol, or other forbidden ingredients.
• Also check whether it contains root ingredients, honey, or other items avoided in your observance.
• If you are following strict vrat, tapas, or higher restraint, you may choose to avoid it because it is a processed food and may involve more violence in production.

So the simple answer is: sometimes yes, but only after checking the ingredients and your level of Jain observance.

For a very strict Jain practice, it is better to choose simple, pure, and minimally processed food.