Expense Tracker

Summary

An app for logging income/expenses with running totals and category breakdowns — practice for array `.reduce()`, form handling and simple data visualization. It is a practical exercise in modeling records, deriving aggregate values, validating input, persisting state, and presenting data in a useful visual summary.

• 1Use `.reduce()` to calculate running totals and category sums. Verify the behavior with realistic data and handle the failure or empty state as well.
• 2Persist entries to localStorage so the tracker survives a refresh. Validate your understanding by applying it in a small practical example.
• 3Add a simple bar or pie breakdown by category, even with basic CSS/SVG.