Code RoomCart items mutated before setState
MediumPrep Room Coding #2025

Cart items mutated before setState

Code reviewAlgorithms & data structuresMid–Senior~18 min

Review this React TypeScript cart editor.

What a strong answer looks like

Separate real bugs from style. Rank issues by severity, point at the root cause rather than the symptom, and suggest a concrete fix, specific and kind.

0:00 of about 18 min
Mark a line and say what kind of problem it is.0 findings
1function Cart() {
2 const [items, setItems] = useState<Item[]>(initialItems);
3 
4 const removeAt = (index: number) => {
5 const next = items;
6 next.splice(index, 1);
7 setItems(next);
8 };
9 
10 return <ItemList items={items} onRemove={removeAt} />;
11}
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