gaearon

If you use server rendering, keep in mind that neither useLayoutEffect nor useEffect can run until the JavaScript is downloaded.

You might see a warning if you try to useLayoutEffect on the server. Here's two common ways to fix it.

Option 1: Convert to useEffect

If this effect isn't important for first render (i.e. if the UI still looks valid before it runs), then useEffect instead.

function MyComponent() {

ryanflorence

function CopyButton({ value }) {
  let [copied, setCopied] = React.useState();
  let hydrated = usePageIsHydrated();
  React.useEffect(() => {
    let id = setTimeout(() => setCopied(false), 2000);
    return () => clearTimeout(id);
  }, [copied]);

  return (
    <button