Roll20/roll20-character-sheets

[Old School Essentials] Add support for multiple classes (optional rule)

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#13,822 opened on Mar 1, 2025

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good first issuehelp wanted

Description

NPCs in old TSR modules written for AD&D often have multiple classes and it would be great to be able to support this on the character sheet.

Contributor guide

Tech stack
htmlcssjavascript
Domain
frontend
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
mostly clear
Prerequisites
Basic knowledge of Roll20 sheet developmentUnderstanding of OSE rule systemHTML/CSS/JavaScript
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
65
Research direction
Start by examining the existing Old School Essentials character sheet files in the repository (likely 'Old School Essentials.html' and 'Old School Essentials.css'). Understand the current single class structure and how class data is stored. Then, design an implementation for multiple classes, such as adding UI elements to select additional classes and modifying sheet workers to compute combined abilities. Consult the Roll20 API documentation for sheet workers and event handling. No prior PRs or comments exist, so this is a clean feature request.