n8n-code-javascript

To write JavaScript in an n8n Code node, use the Run Once for All Items mode and apply a map-based transformation on $input.all() to return results in the format [{json: ...}].

All Items mode processes the entire dataset at once using $input.all(), while Each Item mode processes items individually. Choosing the right mode depends on your data transformation needs.

Yes, you can make HTTP requests inside an n8n Code node by utilizing built-in $helpers, allowing you to handle API integration and webhook data directly within your JavaScript workflow.

Handle dates in n8n JavaScript workflows using the built-in DateTime and Luxon functions. The Code node supports these libraries natively for parsing, formatting, and manipulating date data.

An n8n Code node returns a data format error when output is not structured correctly. Prevent errors by ensuring your JavaScript returns a safe array format like [{json: ...}].

The best way to access webhook data in an n8n Code node is through safe data access patterns using $input.all(). This approach ensures reliable JSON querying and prevents workflow errors.