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Logic Node

The Logic Node allows you to write custom JavaScript or TypeScript code to process, transform, and compute data inside a DotPortion workflow. It gives you full flexibility when visual configuration is not enough, while still keeping execution secure and isolated.

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What the Logic Node Does

The Logic Node is responsible for:
  • Transforming incoming data
  • Performing calculations
  • Restructuring objects
  • Combining data from multiple nodes
  • Preparing data for database or response nodes
It works like a server-side function that runs during workflow execution.
Logic

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Configuration

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Code

The Code field accepts JavaScript or TypeScript. You can reference outputs from previous nodes using dynamic values.
Tip: Type {{ to insert dynamic values from earlier nodes.

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Writing Logic Code

Your code runs in a secure sandboxed environment. You can:
  • Declare variables
  • Perform calculations
  • Create objects and arrays
  • Return a value

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Example: Transform input data

const title = {{parameters.title}};
const description = {{parameters.description}};

return {
  title: title.trim(),
  description: description.trim(),
  createdAt: new Date().toISOString()
};

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Using Dynamic Values

Dynamic values are injected using the {{ }} syntax. They can come from:
  • Request Parameters Node
  • Condition Node
  • Database Node
  • JWT Node
Example: 
const userId = {{params.userId}};

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Returning Data

The return value of the Logic Node becomes its output. This output is available to all downstream nodes.

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Example return value

{
  "total": 1200,
  "discountApplied": true
}

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Execution Rules

  • Code must return a value
  • Execution is synchronous
  • Errors thrown will stop workflow execution
  • Only supported JavaScript/TypeScript features are allowed

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Common Use Cases

  • Data normalization
  • Aggregations
  • Conditional transformations
  • Building response objects
  • Preparing database payloads

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Error Handling

If your code:
  • Throws an error
  • Returns undefined
The workflow fails and an error response is returned.