n8n-code-javascript

To access input data in n8n Code nodes, use $input.all() for all items, $input.first() for the initial item, or $input.item when using Run Once for Each Item mode.

Run Once for All Items processes the entire input array in a single execution, while Run Once for Each Item executes the JavaScript code individually for every input item.

Handle webhook payloads in n8n JavaScript Code nodes by accessing nested data under the body object and using built-in helpers like $helpers.httpRequest for API calls and transformations.

Yes, you can use Luxon DateTime and $jmespath in n8n Code node JavaScript to perform date manipulations and query JSON data structures for complex workflow transformations.

The correct return format for JavaScript in n8n Code nodes is an array of objects where each object contains a json property, ensuring downstream nodes properly receive the transformed data.

n8n Code node JavaScript throws errors during data transformation when return formats are invalid, input access methods mismatch the execution mode, or nested webhook data is accessed incorrectly.