Interactive n8n Code Node JavaScript Hands-On Tutorial

This workflow serves as an interactive, self-contained tutorial for mastering the n8n Code node using JavaScript. It starts with sample user data and progresses through four Code nodes: first, iterating each item to compute fullName and age; second, enriching data via external API (genderize.io) for gender prediction; third, processing all items at once to calculate average age; and fourth, generating a binary CSV file. Users can execute, inspect outputs, and experiment directly.

Benefits include rapid learning of key concepts like $input.item.json, $items(), this.helpers.httpRequest, and Buffer handling, without setup. It's ideal for n8n beginners advancing to custom logic, saving hours of trial-and-error documentation reading.

Use cases span any n8n automation needing JS: data transformation, API enrichment, summaries, or file exports. Though educational, it demonstrates real-world patterns for ETL pipelines, reporting, or integrations in real estate MLS data processing, CRM enrichment, or analytics.