useEffectEvent retains the first render value when it's used inside a component wrapped in memo()
React version: 19.2.0
Steps To Reproduce
Minimal repro:
import { useState, useEffectEvent, useEffect, memo } from "react";
function App() {
const [counter, setCounter] = useState(0);
const hello = useEffectEvent(() => {
console.log(counter);
});
useEffect(() => {
const id = setInterval(() => {
hello();
}, 1000);
return () => clearInterval(id);
}, []);
return (
<div>
<button onClick={() => setCounter(counter + 1)}>{counter}</button>
</div>
);
}
export default memo(App);Link to code example:
https://codesandbox.io/p/sandbox/gj356q
The current behavior
If you click the button and increment the counter you always see 0 in the log. By removing the memo you will see the current counter value.
The expected behavior
See the latest counter value even if the component is wrapped in memo, since the documentation https://react.dev/reference/react/useEffectEvent does not describe any different behavior if component is wrapped in memo.
useEffectEventretains the first render value when it's used inside a component wrapped inmemo()React version: 19.2.0
Steps To Reproduce
Minimal repro:
Link to code example:
https://codesandbox.io/p/sandbox/gj356q
The current behavior
If you click the button and increment the counter you always see
0in the log. By removing thememoyou will see the current counter value.The expected behavior
See the latest counter value even if the component is wrapped in
memo, since the documentation https://react.dev/reference/react/useEffectEvent does not describe any different behavior if component is wrapped inmemo.