n8n-code-javascript

To return data from an n8n Code node safely, always structure your output as an array of objects containing a json property, such as [{ json: { ... } }]. This strict return format prevents execution errors and ensures downstream nodes receive valid data.

Accessing webhook data in an n8n Code node requires safely extracting nested payloads from the .body property. You should apply guardrails for null safety to handle missing fields before processing the incoming HTTP request data.

For batch processing all items in an n8n Code node, use the $input.all() method to access the full array of items. To handle a single item, use $input.first(), and for per-item execution modes, use $input.item.

Yes, you can make HTTP requests inside an n8n Code node by utilizing the built-in $helpers.httpRequest function. This allows you to perform API calls directly within your JavaScript code while maintaining proper error handling.

Your n8n Code node fails because expression syntax should not be used inside JavaScript code. You must avoid expression syntax entirely and rely on standard JavaScript data-access patterns and built-in helpers to prevent execution failures.