Easy javascript

useState counter logic

Problem

Simulate useState: start at 0, increment twice, print final value.

Hints

setState(s => s + 1) twice

Your practice code

Ready — edit the code above and click Run.

Solution

let state = 0;
function setState(updater) {
  state = typeof updater === "function" ? updater(state) : updater;
}
setState(s => s + 1);
setState(s => s + 1);
console.log(state);

Try solving on your own first, then reveal the official answer.

Explanation

Functional updates avoid stale state—critical in async React interview answers.

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