n8n-code-javascript

Data transformation in n8n Code nodes is handled by accessing items via `$input.all()` or `$input.first()`, applying your JavaScript logic, and returning an array of objects containing a `json` property to ensure proper workflow execution.

To prevent workflow errors in n8n JavaScript code, apply safe coding practices including null checks, proper return formatting, and error mitigation patterns. These practices ensure reliable production deployments and prevent common data processing failures.

Yes, you can use built-in n8n helpers like `$helpers.httpRequest()` for API integrations. The Skill provides validated code patterns to help you seamlessly perform API interactions and data querying within your automation workflows.

You query JSON data in n8n workflows using the built-in `$jmespath()` function. This allows for advanced data querying and flexible data access alongside other techniques like filtering and aggregation within the Code node.

Yes, n8n JavaScript code supports Luxon DateTime operations for automation. You can leverage DateTime from Luxon within your Code nodes to handle date and time transformations as part of your data processing logic.

An n8n Code node returns a data format error when output is not properly structured. You must return data as an array of objects with a `json` property, using safe coding practices and null checks to prevent common workflow formatting errors.