n8n-code-javascript

To return data from an n8n Code node without errors, you must format your output as an array of objects, specifically structured as [{json: {...}}]. This strict return format is required for n8n workflows to process the JavaScript output correctly.

In n8n, $input.all() retrieves every item passing through the workflow for batch processing, while $input.first() retrieves only the initial item. You can also use $input.item for safe per-item processing within Code nodes.

You make HTTP requests inside an n8n Code node by using the built-in helper $helpers.httpRequest. This allows you to execute API calls directly within your JavaScript logic safely, without relying on external modules.

Yes, you can use Luxon DateTime for date transformations in n8n workflows. The Code node environment supports the DateTime object natively, enabling robust date handling, formatting, and arithmetic within your JavaScript logic.

Your n8n Code node fails because it runs raw JavaScript, meaning n8n expression syntax like {{ $json.field }} is prohibited. You must access data directly using JavaScript patterns like $input.first().json.field instead.

The best way to query JSON data inside an n8n Code node is using the built-in $jmespath helper. It allows you to perform complex JSON querying and data extraction directly within your JavaScript code safely.