Add TypeScript Intellisense to n8n Code Nodes with JSDoc

This workflow serves as a template to add TypeScript Intellisense support to n8n Code nodes using JSDoc comments. It fetches the current workflow data via the n8n API and processes it in a Code node where custom types (Workflow and Node) are defined with JSDoc typedefs. By casting input data to these types, developers gain autocomplete for properties like id, name, nodes array, and more, mimicking TypeScript behavior in the n8n editor.

The benefits are significant for productivity: reduced typing errors, quicker development of intricate logic, and better exploration of n8n's data structures without constant referencing docs. It transforms vague JavaScript coding into a typed, IDE-friendly experience directly in n8n.

Ideal use cases include self-referential workflows (e.g., analyzing or modifying own structure), complex data manipulations requiring workflow context, custom integrations, or any Code node handling $input.json from n8n nodes. Copy the JSDoc pattern into your own Code nodes for instant Intellisense on common objects like $workflow, $execution, or custom classes.

This lightweight demo (2 nodes) empowers advanced n8n users, saving hours in debugging and prototyping sophisticated automations.