ShopLite is an intentionally seeded test app. No purchases or payments are made.

ShopLite

A small shop. A reproducible bug. A visible fix.

Studio Headphones

Soft on the ears. Easy on the everyday.

₹200

Your checkout

Studio Headphones

Discount code

Try SAVE300 to reproduce the bug. WELCOME10 gives 10% off.

Subtotal₹200

Discount −₹0

Payable total₹200

The regression you can prove

One item costs ₹200. SAVE300 subtracts ₹300. The seeded calculation returns −₹100; the fixed calculation clamps the result to ₹0. Toggle the version to compare.

npm run demo:reproduce
npm run demo:reproduce -- --fixed

Send this bug to the demo desk