Expression
Compute one value from a, b and c with the scalar grammar.
Computes one scalar from a, b and c with the scalar grammar, producing a value of kind. Only a is required, so a one-operand expression needs no placeholder wiring.
At a glance
Module type
Expression
Category
Primitives · Scalar and json
Default tier
reactive
Runs on
reactive, durable
Starts a flow
no
Holds a body
no
Keeps state between runs
no
Available in
every application type
Parameters
kind
"string" | "number" | "boolean" | "datetime" · required · defaults to "number"
The type of the result.
expression
string · required · defaults to ""
The scalar expression over a, b and c.
Inputs
on
event
no
Implicit on every module that does not itself start a flow: wire an event here to make this module the start of what that event runs.
a
scalar
yes
The first operand.
b
scalar
no
The second operand, if the expression uses one.
c
scalar
no
The third operand, if the expression uses one.
Outputs
value
scalar
scalar, json, text, signal
What expression evaluated to.
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