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docs: add tip when mixing universal and server load #11822

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docs: add tip when mixing universal and server load #11822

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2 changes: 2 additions & 0 deletions documentation/docs/20-core-concepts/20-load.md
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Expand Up @@ -216,6 +216,8 @@ export async function load({ data }) {
}
```

> It's important to not modify `data` to include any non-serializable objects since it will be processed by the **server** `load` after the **universal** `load` returns.
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"[...] processed by the server load [...]"

Is not quite right. It is just that the result of the server load gets serialized for hydration, and you can modify this result (the data prop) in the universal load function (which runs right after the server load function and before the serialization of the server load function's result).

Maybe this bug could also be fixed if we serialize the server load function's result before running the universal load function.


## Using URL data

Often the `load` function depends on the URL in one way or another. For this, the `load` function provides you with `url`, `route` and `params`.
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