Expressions

Expressions let a node pull data from earlier in the flow. Any field on a node can be a static value or a dynamic expression — toggle between the two on the field itself.

Syntax

Wrap an expression in double braces. Reference the current item's JSON, or a named node's output:

{{ $json.email }}
{{ $node["Lead form"].json.email }}
{{ $node["Read sheet"].json.rows[0].name }}

Expressions resolve live against the actual data flowing through the run — so what you reference is what the step received, not a guess.

Mapping

You can drag a field from a previous step's output onto an input to build the expression for you, or write it by hand. Static and dynamic values coexist on the same node.