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docs: add note about @types/react for default JSX mode #3040

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bartlomieju merged 1 commit into from
Apr 9, 2026
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docs: add note about @types/react for default JSX mode #3040

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11 changes: 11 additions & 0 deletions runtime/reference/jsx.md
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Expand Up @@ -29,6 +29,17 @@ options by default:
}
```

:::note

When using the default `"react"` mode with React, you'll need to add
`@types/react` for type checking to work (e.g.,
`"@types/react": "npm:@types/react"` in your `deno.json` imports). Without it
you'll get errors like `JSX element implicitly has type 'any'`. Consider using
the [automatic runtime](#jsx-automatic-runtime-recommended) instead, which is
the recommended approach.

:::

Using the `"react"` option will convert JSX into the following JavaScript code:

```jsx
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