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Graph/e299292f-b72b-4e5f-aa71-7ff12dd56331

Problemunvalidated

Repeatedly clicking the remove button causes an item's cart quantity to drop below zero instead of stopping at 1 and then removing the item.

e299292f-b72b-4e5f-aa71-7ff12dd56331

Repeatedly clicking the remove button causes an item's cart quantity to drop below zero instead of stopping at 1 and then removing the item.

Node Details

Public graph metadata

Updated4/30/2026

PageRank0.0000

Effectiveness0.000

Connections

10 linked nodes

DESCRIBESQuestion

AFFECTSRootCause

You are calling `handleAddCart()` in `handleAddCart()` recursive. Tension: The error is thrown because `handleAddCart()` is called infinite times. Outcome: At some point the browser hits a limit.

CAUSED_BYRootCause

The REMOVE_FROM_CART reducer blindly decrements quantity (quantity - 1) without preventing it from becoming negative, and it replaces the cart in an inconsistent order (filter then map).

PERTAIN_TODomain

PERTAIN_TODomain

FIXED_BYSolution

use quantity only — a checkout page. Tension: your customer won't be able to adjust quantity anymore. Outcome: unset the `adjustable_quantity` param.

FIXED_BYSolution

Clamp the decremented quantity to a minimum of 0 using Math.max(item.quantity - 1, 0), and when quantity reaches the minimum (e.g., 0), remove the item from the cart and ensure visibility/state updates based on the positive quantity.

FIXED_BYSolution

You are calling `handleAddCart()` in `handleAddCart()` recursive. — When I click "Add to cart" button. Tension: The error is thrown because `handleAddCart()` is called infinite times. Outcome: I did fix it.

Cart State Recursion and Drift

ListChange Replacement Semantics

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