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Apr 26, 2024
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Better use(Promise) example in 19 blog #6790

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Better use(Promise) example in 19 blog
rickhanlonii Apr 26, 2024
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Better use(Promise) example in 19 blog
rickhanlonii Apr 26, 2024
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17 changes: 13 additions & 4 deletions src/content/blog/2024/04/25/react-19.md
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Expand Up @@ -243,14 +243,23 @@ In React 19 we're introducing a new API to read resources in render: `use`.

For example, you can read a promise with `use`, and React will Suspend until the promise resolves:

```js {1,6}
```js {1,5}
import {use} from 'react';

function Comments({commentsPromise}) {
// NOTE: this will resume the promise from the server.
// It will suspend until the data is available.
// `use` will suspend until the promise resolves.
const comments = use(commentsPromise);
return comments.map(comment => <p>{comment}</p>);
return comments.map(comment => <p key={comment.id}>{comment}</p>);
}

function Page({commentsPromise}) {
// When `use` suspends in Comments,
// this Suspense boundary will be shown.
return (
<Suspense fallback={<div>Loading...</div>}>
<Comments commentsPromise={commentsPromise} />
</Suspense>
)
}
```

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