React Hook Warnings for async function in useEffect: useEffect function must return a cleanup function or nothing

Note: If you want to support SSR/SSG for SEO, use framework specific api from React-router/Remix, Next.js or Gatsby. For React version >=19 We now have nice loader and form action api: Loading data: function Comments({ dataPromise }) { const data = use(dataPromise); return <div>{JSON.stringify(data)}</div>; } async function loadData() { return { data: "some data" }; } export function Index() { ret