> For the complete documentation index, see [llms.txt](https://doc.duaer.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.duaer.com/nodes/n8n-nodes-base.function.md).

# Use the Code node instead in Duaer

In Duaer, the Function node is removed. Write JavaScript in the Code node. This URL remains so old links are not empty.
## Function is removed

If an old digital organization still has a Function node, the upgrade check asks you to replace it. Use the Code node for the same script logic. Expressions and built-ins are under [expressions and code](/code/expressions.md).
## Questions

### Does Duaer still ship the Function node?

No. The old Function node is removed. Write JavaScript in the Code node. This docs URL stays so old links do not land on an empty page.