Capstone: ship Smart Ledger
Assemble the product
This capstone starts empty—there is no fake ledger. A real user adds their own transactions. The app validates and normalizes input, stores amounts as agorot, persists locally, derives KPIs, filters rows, deletes entries, and exports a JSON backup.
The export is a real artifact. The storage is real browser storage. The only limitation is deliberate: this learning project never connects to a bank and never asks for banking credentials.
Instrucciones
Implement loadTransactions and saveTransactions using localStorage and JSON.
Pista: Restore [] on parse failure; stringify transactions on every mutation.
¿Dónde va esto?
// Assemble: load/save, validation, add/delete, derived KPIs, filter, and JSON export.Escríbelo en la línea 5: debajo de ese comentario, después del código que ya añadiste.
Validate and normalize input in createTransaction.
Render KPIs and filtered rows from the transactions array.
Implement add and delete flows, saving after each mutation.
Export a real JSON backup with Blob and URL.createObjectURL.
Tu código
Describe lo que quieres construir para este paso y escribiré el código — luego haz clic en Aplicar para llevarlo a tu editor. Este paso: Implement loadTransactions and saveTransactions using localStorage and JSON.