Javascript Code Execution

Run custom JavaScript scripts directly inside your workflow. Use it for fast data formatting, string manipulation, date operations, or lightweight logic between nodes.

1. Add the ModuleCopy Anchor Link

Add the JavaScript Code module to your workflow as an action node.

2. Pass Data In ContextCopy Anchor Link

In the module configuration panel, add context variables under the Context section. Each entry takes a Name and a Value use the variable picker to map values from upstream nodes.

Each context entry becomes a key on WORKFLOW_CONTEXT inside your script:

function main(WORKFLOW_CONTEXT) {
    const amount = WORKFLOW_CONTEXT.amount;
    const currency = WORKFLOW_CONTEXT.currency;
}

3. Write Your ScriptCopy Anchor Link

Your script must define a main function. Stacksync automatically injects WORKFLOW_CONTEXT as the argument containing all your context values.

function main(WORKFLOW_CONTEXT) {
    const amount = WORKFLOW_CONTEXT.amount;
    const currency = WORKFLOW_CONTEXT.currency;
    return {
        amount: amount,
        currency: currency
    };
}

4. Return DataCopy Anchor Link

Whatever main returns becomes the node's output, available to downstream nodes via standard node referencing.

Reference in downstream nodes:

{{ your_module_id.amount }}
{{ your_module_id.currency }}

Debugging: console.log() output is captured and surfaced under metadata.stdout in the execution logs. Use it for debugging, it does not pass data downstream.

Available LibrariesCopy Anchor Link

Note: You cannot install additional packages at runtime with npm install.

LimitsCopy Anchor Link

Watch out: Avoid using JavaScript for slow HTTP calls, heavy loops, or large dataset operations as the timeout is 6 seconds, use the Python Code module instead.