Callback — logic.callback

Calls a wired-in function reference — not a named function you pick from a list, but whatever function value happens to be wired into it (from a Function node in "For Calling / Callback" usage, a "function"-typed variable, or any other node that produces a function value) — with however many arguments you give it, and captures the result.

• Inputs: in (exec) — "In"; function (value) — "Function"; plus dynamic arg-<id> value pins, each with inline free-form literal editing when unwired
• Outputs: out (exec) — "Next"; result (value) — "Result"
• Config fields: none

Grow or shrink the argument list with the "+ Add Arg"/"×" buttons rendered directly on the node face — unlike Path Extractor's parameters, an argument can be removed from anywhere in the list, not just the end.

// "function" wired from a variable holding a function value, two arguments
const result = onComplete(orderId, "shipped");

Use case: invoke a function that was handed to you as a value — for example, a callback stored in a variable or passed in from elsewhere — without knowing in advance which specific function it'll be at compile time.

Usable both on the main canvas and inside a Function Graph.