mosh-expense-tracker-starter/CLAUDE.md

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Project Overview

Expense tracker app from Mosh's Claude Code course. It intentionally has bugs, poor UI, and messy code — all fixed throughout the course.

Commands

• npm run dev — Start Vite dev server (http://localhost:5173)
• npm run build — Production build
• npm run lint — ESLint

Architecture

Single-component React 19 app with Vite 7. All state and UI live in src/App.jsx — no routing, no state library, no backend. Plain CSS styling via App.css and index.css.

Known Intentional Issues

• Transaction amounts stored as strings, so reduce() concatenates instead of summing
• "Freelance Work" is typed as "expense" instead of "income"