n8n-code-javascript

To return data from an n8n Code node without getting an error, you must structure your output as an array of objects using the exact [{json: {...}}] format. Enforcing this return convention prevents execution errors across both All Items and Each Item modes.

Access webhook payload data in an n8n Code node by referencing the recommended .body structure. You should implement safe access patterns and null checks to guard against missing data when handling incoming HTTP webhook requests.

All Items mode processes the entire batch of input data at once using $input.all(), while Each Item mode processes individual items sequentially using $input.item. Choosing the correct execution mode ensures proper data transformation and routing.

Yes, you can make HTTP API calls directly within an n8n Code node using the built-in $helpers.httpRequest() method. This allows you to fetch external data, enrich your current items, and aggregate API results within a single JavaScript execution.

Handle date and time operations in n8n JavaScript using the built-in Luxon DateTime object. This integration allows you to perform robust date-time manipulations, format conversions, and arithmetic calculations directly inside your Code node workflow.

Your n8n Code node fails on null values because JavaScript cannot access properties of undefined objects. You must implement safe null checks and safe access patterns before manipulating webhook bodies or input items to prevent workflow crashes.