n8n-code-javascript

JavaScript in n8n Code nodes transforms raw data by accessing patterns like $input and $node, implementing custom logic, and returning structured arrays for workflow automation. Use it to reshape, enrich, and normalize data from various sources.

n8n Code node webhook data errors often stem from incorrect return formats or expression syntax confusion. You must properly structure the incoming webhook data and return a valid array of objects to prevent production errors.

The best way to make HTTP requests in n8n workflow automation is using the built-in $helpers.httpRequest function within Code nodes. This allows you to fetch external API data and parse responses directly alongside your custom transformation logic.

Yes, you can use built-in DateTime functions in n8n Code nodes for data transformation. They allow you to parse, format, and manipulate date values directly within your JavaScript logic for accurate workflow automation.

$input and $node are data access patterns in n8n Code nodes. $input accesses data from the immediate previous node, while $node references data from specific named nodes, enabling complex conditionals and batch processing across the workflow.

To filter an array of user objects in an n8n Code node, write a JavaScript function that iterates through $input data, applies a conditional filter like checking for active status, and returns only the matching objects as a structured array.