How do I access webhook data in an n8n Code node?

Webhook data is specifically nested under the body property. You should use $json.body or $input.first().json.body to access your payload fields correctly.

What is the mandatory return format for n8n Code nodes?

You must always return an array of objects where each object contains a 'json' property, for example: [{json: {key: value}}]. Failing to follow this structure will cause the workflow to fail.

Does this skill support date manipulation in n8n?

Yes, it provides guidance on using the built-in Luxon (DateTime) library, which is available inside Code nodes for formatting, arithmetic, and parsing dates.

When should I use 'Run Once for All Items' mode?

Use this mode for most use cases, including data aggregation, filtering, sorting, or any logic that requires comparing or combining multiple input items into a single result.

Can I make HTTP requests inside the n8n Code node?

Yes, n8n provides a built-in $helpers.httpRequest() method that allows you to perform asynchronous API calls directly within your JavaScript code node.

n8n JavaScript Code Assistant

Name: n8n JavaScript Code Assistant
Author: ProfSynapse

byProfSynapse

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生産性とワークフロー

Optimizes n8n workflow development by providing expert guidance on JavaScript Code node syntax, data structures, and best practices.

概要

The n8n-code-javascript skill empowers developers to write efficient and error-free JavaScript within n8n Code nodes. It provides comprehensive guidance on choosing between execution modes, accessing input data via $input or $node, and handling specific data structures like webhook payloads. By enforcing critical return format requirements and offering production-ready patterns for data transformation, aggregation, and HTTP requests, this skill helps users avoid common pitfalls and accelerate the automation building process.

主な機能

40 GitHub stars
Expert syntax guidance for $input, $json, and $node data access patterns
Best practices for using built-ins like $helpers.httpRequest and Luxon
Error prevention strategies for return formats and nested webhook data
Pre-built templates for data aggregation, filtering, and transformation
Automated mode selection advice for 'All Items' vs 'Each Item' execution

ユースケース

Transforming complex JSON payloads between disparate API nodes
Aggregating data from multiple workflow items into a single summary report
Building custom logic for webhook processing with safe data access and validation

概要

主な機能

40 GitHub stars
Expert syntax guidance for $input, $json, and $node data access patterns
Best practices for using built-ins like $helpers.httpRequest and Luxon
Error prevention strategies for return formats and nested webhook data
Pre-built templates for data aggregation, filtering, and transformation
Automated mode selection advice for 'All Items' vs 'Each Item' execution

ユースケース

Transforming complex JSON payloads between disparate API nodes
Aggregating data from multiple workflow items into a single summary report
Building custom logic for webhook processing with safe data access and validation