How do I make an API call inside an n8n Code node?

Use the built-in $helpers.httpRequest() method, which allows you to perform asynchronous HTTP requests directly within your JavaScript code.

Why does my n8n Code node return a 'format' error?

n8n requires the return value to be an array of objects, where each object contains a 'json' key (e.g., return [{json: { data: 'value' }}]).

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

Webhook data is typically nested under the body property. You should access it using $input.first().json.body or $json.body.

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

Use 'All Items' mode for 95% of cases, especially when you need to aggregate data, calculate totals, or filter the entire dataset at once.

n8n JavaScript Code Assistant

Name: n8n JavaScript Code Assistant
Author: thanhtoan105

bythanhtoan105

•

生産性とワークフロー

Optimizes the development and troubleshooting of JavaScript logic within n8n Code nodes using standardized patterns and best practices.

概要

This skill provides expert-level guidance for writing JavaScript within n8n automation workflows. It helps developers master the specific syntax required for n8n, such as $input and $json accessors, while ensuring data is returned in the mandatory array-of-objects format. By offering clear patterns for data transformation, webhook handling, and the use of built-in helpers like Luxon for dates and JMESPath for querying, this skill reduces debugging time and prevents common pitfalls like incorrect mode selection or nested body errors.

主な機能

Expert guidance on $input.all(), $input.first(), and $input.item data access
Specialized handling for nested webhook body structures
Implementation patterns for Luxon (DateTime) and $helpers.httpRequest()
Comparative analysis for 'Run Once for All Items' vs. 'Each Item' modes
1 GitHub stars
Validation for n8n's strict [{json: {}}] return format requirement

ユースケース

Aggregating and calculating totals across multiple workflow items
Normalizing and transforming complex JSON payloads from diverse API sources
Implementing custom data validation logic with robust error handling

概要

主な機能

Expert guidance on $input.all(), $input.first(), and $input.item data access
Specialized handling for nested webhook body structures
Implementation patterns for Luxon (DateTime) and $helpers.httpRequest()
Comparative analysis for 'Run Once for All Items' vs. 'Each Item' modes
1 GitHub stars
Validation for n8n's strict [{json: {}}] return format requirement

ユースケース

Aggregating and calculating totals across multiple workflow items
Normalizing and transforming complex JSON payloads from diverse API sources
Implementing custom data validation logic with robust error handling