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Bug: useState hook not updating state correctly in async functions

Open Arun24-8 opened this issue 3 months ago • 2 comments

Bug Description

When using useState hook inside an async function, the state doesn't update correctly after awaiting a promise.

Steps To Reproduce

  1. Create a component with useState
  2. Create an async function that awaits a promise
  3. Try to update state after the await
  4. State shows stale value

Expected Behavior

State should update correctly after async operations

Actual Behavior

State retains old value

React version: 19.0.0

Arun24-8 avatar Nov 26 '25 10:11 Arun24-8

It doesn't look like this bug report has enough info for one of us to reproduce it.

Please provide a CodeSandbox (https://react.new), or a link to a repository on GitHub.

Here are some tips for providing a minimal example: https://stackoverflow.com/help/mcve

eps1lon avatar Nov 26 '25 10:11 eps1lon

This is not a React bug.

When you await inside a function, you create a new continuation, and any variables captured earlier (including state values) remain the old value. This is expected JavaScript behavior, not a React defect.

React will update state — but your async function will still “see” the old state if you reference stale closures.

✅ Use Functional State Updates

Functional updates ensure your state is always fresh, even after await:

const [count, setCount] = useState(0);

async function handleClick() {
  await someAsyncTask();

  setCount(prev => prev + 1); // always correct
}

This avoids stale closures entirely.

karankumbhare90 avatar Dec 08 '25 06:12 karankumbhare90