Live Interactive Demo Model
Shopping Cart Item Counter
A cart drawer calculating subtotals, tax, discounts, and item counts with animated badge indicators.
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React 19 Practice Workbench
Acceptance Criteria
Calculating derived state (subtotal, tax, grand total) with Array.reduce
Incrementing and decrementing specific cart item quantities
Handling empty cart states and promo code applications
Target APIs & Concepts
Cart Total ReducersItem Quantity SteppingImmutable Item Removal
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