programming#react#hooks#javascript
React 19 useOptimistic Explained
The new hook that makes optimistic UI trivial — with a working example.
useOptimistic in React 19
Optimistic updates without state gymnastics:
const [optimisticTodos, addOptimistic] = useOptimistic(todos, (state, newTodo) => [...state, newTodo]);
async function submit(formData) {
const todo = { id: Date.now(), text: formData.get('text') };
addOptimistic(todo);
await saveTodo(todo);
}
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