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What is streaming SSR with Suspense in Next.js?

Q: What is streaming SSR with Suspense in Next.js?

**TL;DR.** **Streaming SSR** sends the page **shell immediately** and streams in parts as their data resolves, using **Suspense** boundaries ( loading.js or explicit <Suspense> ). The user sees content faster and **slow data doesn't block** the whole page. shell + fast content (sent first) <Suspense> slow A streams when ready <Suspense> slow B <text class=

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Understand the problem

Sending HTML in chunks as data resolves.

nextjsstreamingsuspensessr

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Read the code

Independent streaming with Suspense

import { Suspense } from 'react';

export default function Page() {
  return (
    <>
      <Header />                                   {/* sent immediately */}
      <Suspense fallback={<Skeleton />}>
        <SlowFeed />                               {/* streams in when ready */}
      </Suspense>
      <Suspense fallback={<Skeleton />}>
        <SlowSidebar />                            {/* streams independently */}
      </Suspense>
    </>
  );
}

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