n8n-code-javascript

To return data from an n8n Code node, you must wrap your output in a properly formatted array structure like [{json: {...}}] to ensure the workflow processes the transformed items correctly.

n8n webhook data access fails when you do not explicitly extract the payload from the .body property, which is required for safe data handling and reliable API integrations within your automated workflows.

Handling All Items vs Each Item execution modes in n8n requires using specific data access patterns like $input.all() for all items or $input.item for each item to achieve predictable transformations.

You cannot use {{}} expressions inside n8n JavaScript Code nodes; you must implement data transformations and logic using pure JavaScript and built-in utilities like $helpers.httpRequest instead.

The best way to prevent errors in n8n Code node JavaScript is to apply robust validation patterns and safe data access methods using $input.all() and $input.first() for consistent workflow results.

Yes, this approach works for complex data transformations in n8n by enforcing explicit data access and reliable return formatting across both All Items and Each Item execution modes for production environments.