n8n-code-javascript

Name: n8n-code-javascript
Availability: InStock
Author: gabrielrdga

Craft and optimize JavaScript Code Node workflows in n8n.

Updated Apr 11, 2026

Search Tags:#javascript #n8n #webhook #data-access #http-request #code-node #luxon

Ready to run

npx skills add https://github.com/gabrielrdga/n8n-skills --skill n8n-code-javascript-gabrielrdga

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: n8n-code-javascript
Source: https://github.com/gabrielrdga/n8n-skills/tree/main/skills/n8n-code-javascript
Command: npx skills add https://github.com/gabrielrdga/n8n-skills --skill n8n-code-javascript-gabrielrdga

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

It provides expert guidance for writing JavaScript code in n8n Code nodes, helping users avoid common pitfalls and maximize the use of built-in functions.

Core Features & Use Cases

Comprehensive mode guidance for Code nodes (All Items vs. Each Item) and safe data access patterns.
In-depth reference to common patterns, error prevention, and built-in helpers (http requests, DateTime/Luxon, JSON querying).
Real-world workflows coverage including API integration, webhook handling, and data transformation.

Quick Start

Open a Code node, select Run Once for All Items, and try a simple map-based transformation that returns [{json: ...}] using $input.all().

Frequently Asked Questions about n8n-code-javascript

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I write JavaScript in an n8n Code node to transform data?▼

To write JavaScript in an n8n Code node, use the Run Once for All Items mode and apply a map-based transformation on $input.all() to return results in the format [{json: ...}].

What is the difference between All Items and Each Item modes in n8n Code nodes?▼

All Items mode processes the entire dataset at once using $input.all(), while Each Item mode processes items individually. Choosing the right mode depends on your data transformation needs.

Can I make HTTP requests inside an n8n Code node?▼

Yes, you can make HTTP requests inside an n8n Code node by utilizing built-in $helpers, allowing you to handle API integration and webhook data directly within your JavaScript workflow.

How do I handle dates with Luxon in n8n JavaScript workflows?▼

Handle dates in n8n JavaScript workflows using the built-in DateTime and Luxon functions. The Code node supports these libraries natively for parsing, formatting, and manipulating date data.

Why does my n8n Code node return a data format error?▼

An n8n Code node returns a data format error when output is not structured correctly. Prevent errors by ensuring your JavaScript returns a safe array format like [{json: ...}].

What is the best way to access webhook data in an n8n Code node?▼

The best way to access webhook data in an n8n Code node is through safe data access patterns using $input.all(). This approach ensures reliable JSON querying and prevents workflow errors.