Function

Transform

Function is a widget flow node that allows you to execute predefined functions on your data.

Description

The Function node provides a way to perform data transformations, calculations, and other operations using built-in functions. This is useful for manipulating context values, formatting data, or performing calculations before passing data to subsequent nodes.

Configuration

The configuration consists of a list of functions to execute in sequence. Each function has a name and arguments.

Function Name

Function Name – the name of the function to execute. Available functions include:

Name	Description	Arguments
Math addition (+)	Adds two numbers together	2
Math subtraction (-)	Subtracts second number from first	2
Math multiplication (*)	Multiplies two numbers together	2
Math division (/)	Divides first number by second	2
Math modulo (%)	Calculates remainder after division	2
Math power (a^b)	Raises first number to power of second	2
Math square root (√a)	Calculates square root of number	1
Math absolute (|a|)	Gets absolute value of number	1
Math sign	Gets sign of number (-1, 0, or 1)	1
Math floor	Rounds number down to nearest integer	1
Math ceil	Rounds number up to nearest integer	1
Math round	Rounds number to nearest integer	1
String to lower case	Converts string to all lowercase	1
String to upper case	Converts string to all uppercase	1
String trim	Removes whitespace from start and end	1
String length	Gets number of characters in string	1
String replace	Replaces first occurrence of substring	3 (input, find, replace)
String replace all occurrences	Replaces all occurrences of substring	3 (input, find, replace)
String replace using regular expression	Replaces matches using regex pattern	3 (input, regex, replace)
String encode to base64	Encodes string to base64 format	1
String decode from base64	Decodes string from base64 format	1
String encode to base64url	Encodes string to base64url format	1
String decode from base64url	Decodes string from base64url format	1
String encode to URL	Encodes string for use in URLs	1
String decode from URL	Decodes URL-encoded string	1
Substring	Extracts portion of string using indices	3 (input, start, end)

Arguments

Arguments – the arguments to pass to the function. You can use context values as arguments, and the function will be applied to those values.

WARNING

For string operations, a missing context value is treated as an empty string (''). For mathematical operations, a missing or non-numeric value is treated as 0.

INFO

Functions are executed in the order they appear in the configuration. The output of one function cannot be used as input for the next function in the same node.

Limitations

Name	Value
Max functions	50
Max function argument input length	1024
Max compiled argument length	Unlimited
Inputs	Exactly one
Outputs	Exactly one

Context values

Each function in a node generates a context value in the format return_fn_{n} (where n is sequential number of a function starting with 1), which contains the result of the function execution.