n8n-code-javascript

To write JavaScript in n8n Code nodes, use $input.all() for batch processing or $input.item for per-item logic, ensuring you return an array of objects structured as [{json: {...}}] for valid workflow data transformation.

Yes, you can make HTTP requests inside n8n workflows using the built-in $helpers.httpRequest() function within Code nodes, eliminating the need for external scripts or packages to fetch API data.

The correct return format for n8n Code nodes is an array of objects where each item contains a json property, explicitly structured as [{json: {...}}], to ensure downstream workflow nodes receive the transformed data properly.

Handle dates and query JSON in n8n without external packages by using built-in functions like DateTime for Luxon date handling and $jmespath() for JSON querying directly within your Code node scripts.

Webhook data access in n8n fails when not properly referencing the payload; you must safely access incoming webhook data under the .body property to extract values correctly within your Code node logic.

Yes, n8n supports both batch and per-item execution patterns for data transforms using $input.all() and $input.item respectively, allowing flexible implementation of complex logic, safe null checks, and robust error handling.