IF

logic.if Logic v0.1.0

Routes input to a true or false output based on a typed condition.

The IF step on the Studio canvas
The IF step as it appears on the Studio canvas — input pins on the left, output ports on the right.

Finding it in the library

Search the builder's node library for IF (it lives under Logic). A single click opens the in-editor docs panel shown here — description, ports, and every property, without leaving the canvas. Double-click (or drag) to add it to the workflow.

IF in the node library, with the in-editor docs panel open
The library entry and the in-editor docs panel for IF — the same reference this page is generated from.

Wired up in the builder

IF in a real, runnable flow — captured live from the Studio editor, exactly as it looks on your canvas. This is the same workflow used for the example input & output below.

IF wired into a runnable workflow in the Studio builder
IF wired into a runnable flow — input on the left, output on the right.

How it’s configured

The node’s settings as the builder shows them — every field laid out with real values. In the Studio these are edited on the node: click the chevron on the divider under its ports to open them.

The IF node's settings in the Studio builder
The settings for IF, showing the values from the flow above.

Ports

Ports are the node’s contract with its neighbours. In the editor a port label renders bold when wired and italic when optional; ◈ ports accept attachment carriers rather than data wires.

DirectionPortLabelWhat flows through it
InputinputInput
OutputtrueTrue
OutputfalseFalse

How data flows through it

IF consumes the content of the incoming envelope — when it is fed directly by a trigger, the trigger’s wrapper is unwrapped at the node boundary so the node sees the actual data, not the metadata shell. Its output becomes the payload for the next node, while the envelope (trace ids, correlation, binary refs) rides along untouched. In the Runs view you always see the whole envelope for both sides of this node.

Expressions in the config

String-typed properties accept {{ }} expressions evaluated against the incoming item at run time — e.g. {{ $json.customer.email }}. On this node that’s value. JSON- and code-typed fields never interpolate — they are passed through literally.

Build it with AI

Every node in this reference is reachable through Flowdrome’s AI Copilot and the MCP tools — say what you want, and the graph surgery happens server-side. Node types resolve fuzzily, so the catalog label (IF) works as well as the exact type id (logic.if).

In the Copilot panel (or any connected AI):

add a if node after the trigger

As a step in a create_chain_workflow call:

{"type":"IF","config":{}}
Raw MCP call — add this node to a workflow with add_node 
curl -s -X POST http://localhost:4800/mcp -H "content-type: application/json" -d '{ "jsonrpc": "2.0", "id": "1", "method": "tools/call", "params": { "name": "add_node", "arguments": { "workflowId": "<id>", "type": "IF" } } }'

Example input & output

Captured from a real test run of the workflow above — this is what the Runs view shows after pressing Test workflow.

On this run the node emitted on port true.

Input — what the node received

The IF node's input envelope in the run data viewer
The input envelope in the Runs view — Flowdrome always shows the whole envelope, with the payload inside body.

Output — what the node produced

The IF node's output envelope in the run data viewer
The output envelope after the step ran.

Property reference

Every setting, with its type and default — the same fields shown configured above.

PropertyTypeDefaultDescription
Field path
path		 field "status" Field from the input to test — pick from the data flowing in, type a dotted path (envelope fields like createdAt or meta.result work too), or use a {{ }} expression: a pure expression is the value itself, an interpolated one like items.{{ $json.idx }} composes the path.
Operator
operator		 select "equals" Comparison that routes to the true/false ports.
containsequalsexistsgreaterThangreaterThanOrEquallessThanlessThanOrEqualmatchesnotEqualsnotExists
Value
value		 string "ready" Value to compare against — {{ }} expressions evaluate against the incoming data ({{ $vars.want }}, {{ $json.threshold * 2 }}).
Value path
valuePath		 field — Optional field to read the comparison value from (pick from the input).
Case sensitive
caseSensitive		 boolean false Match strings case-sensitively.

Related nodes

The rest of the Logic group — the same folder you’d scan in the editor’s library.

  • Filter / Condition Evaluates a condition against input and returns the pass/fail decision.
  • Result Routes by the LAST outcome on the envelope's result ledger — succeeded, failed, skipped, or canceled — so a fl
  • Switch Routes input to one or more named outputs based on ordered conditions.
  • Merge Combine the items of multiple inputs — append, combine by matching fields / position / all combinations, or ch
  • Rate Limit Multi-tenant rate limiting: identifies the caller by a tenant GUID header, enforces per-second/minute/hour/day
  • Loop Over Items Iterate a list: run the inside body once per batch of items, then emit everything on done.
  • Thread Pool Queue-fed concurrency frame: consume from the input queue, run the inside body on a pool of threads, publish e
  • Junction A point on a wire that flow can come back through: wire any node further down into its Return port and everyth

This page is generated from the node registry by gen-node-docs.mjs on every site build — ports, properties, defaults and visibility rules cannot drift from the code. The screenshots and example data are captured from a live Flowdrome by npm run shots:nodes and npm run gen:examples.