33 lines
1.3 KiB
Markdown
33 lines
1.3 KiB
Markdown
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---
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title: Server-side Rendering (SSR)
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description: Use Server-side Rendering to render pages on each request.
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---
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> Also referred to as "SSR" or "Dynamic Rendering".
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If a page uses **Server-side Rendering**, the page HTML is generated on **each request**.
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To use Server-side Rendering for a page, you need to `export` an `async` function called `getServerSideProps`. This function will be called by the server on every request.
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For example, suppose that your page needs to prerender frequently updated data (fetched from an external API). You can write `getServerSideProps` which fetches this data and passes it to `Page` like below:
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```jsx
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export default function Page({ data }) {
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// Render data...
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}
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// This gets called on every request
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export async function getServerSideProps() {
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// Fetch data from external API
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const res = await fetch(`https://.../data`)
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const data = await res.json()
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// Pass data to the page via props
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return { props: { data } }
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}
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```
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As you can see, `getServerSideProps` is similar to `getStaticProps`, but the difference is that `getServerSideProps` is run on every request instead of on build time.
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To learn more about how `getServerSideProps` works, check out our [Data Fetching documentation](/docs/pages/building-your-application/data-fetching/get-server-side-props).
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