Hands-On n8n Code Node JavaScript Tutorial
Interactive tutorial workflow teaching n8n's Code node from basics like item processing to advanced API calls, data aggregation, and CSV export.
This workflow serves as a comprehensive hands-on tutorial for mastering the Code node in n8n using JavaScript. It starts with sample user data and progresses through four Code nodes: first calculating full names and ages for each item; second enriching data via an external API (genderize.io) using this.helpers.httpRequest; third aggregating all items to compute average age; and fourth generating a binary CSV file with Buffer.
Benefits include deep understanding of Code node modes ('Run Once for Each Item' vs. 'Run Once for All Items'), flexible data manipulation without extra nodes, and practical skills in API integration and binary handling, saving time on complex automations.
Ideal use cases: Beginners learning n8n JavaScript for custom logic; developers prototyping data pipelines; teams training on advanced features. No setup required—just run and experiment to see data transformations in real-time.
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How to import this workflow into n8n
- 1Purchase or download the workflow to get the n8n workflow JSON file.
- 2In your n8n instance, open Workflows and choose "Import from File" (or paste the JSON with Ctrl+V on the canvas).
- 3Open each node marked with a credential warning and connect your own accounts and API keys.
- 4Run the workflow once manually to verify the data flow, then toggle it to Active.
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