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Update preview mode docs to include API Routes #16705

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Aug 31, 2020
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12 changes: 12 additions & 0 deletions docs/advanced-features/preview-mode.md
Original file line number Diff line number Diff line change
Expand Up @@ -203,6 +203,18 @@ You can pass an object to `setPreviewData` and have it be available in `getStati

The preview mode works on `getServerSideProps` as well. It will also be available on the `context` object containing `preview` and `previewData`.

### Works with API Routes

API Routes will have access to `preview` and `previewData` under the request object. For example:

```js
export default function myApiRoute(req, res) {
const isPreview = req.preview
const previewData = req.previewData
// ...
}
```

### Unique per `next build`

Both the bypass cookie value and the private key for encrypting the `previewData` change when `next build` is completed.
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