Behavior
- Reads the value from the specified input variable
- Applies the selected transformation with optional parameters
- Stores the result in the
resultoutput variable - Routes to
SuccessorErrorbased on the outcome
Configuration
| Parameter | Type | Default | Description |
|---|---|---|---|
inputVariable | string | "" | Variable to read the input value from |
transformType | enum | "to_upper" | Transformation to apply (see table below) |
params | object | {} | Additional parameters specific to the transform type |
Transform types
| Type | Description | Relevant params |
|---|---|---|
to_upper | Convert to uppercase | — |
to_lower | Convert to lowercase | — |
trim | Remove leading/trailing whitespace | — |
replace | Find and replace text | pattern, replacement |
substring | Extract a portion of the string | startIndex, endIndex |
split | Split string into an array | separator |
join | Join array elements into a string | separator |
json_parse | Parse a JSON string into an object | — |
json_stringify | Convert an object to a JSON string | — |
number_format | Format a number with decimal places | numberFormat (0–5 decimal places) |
date_format | Format a date value | dateFormat (ISO, locale, timestamp) |
regex_extract | Extract text matching a regex pattern | pattern |
Params reference
| Param | Type | Description |
|---|---|---|
pattern | string | Regex pattern or search string (for replace, regex_extract) |
replacement | string | Replacement string (for replace) |
separator | string | Delimiter (for split, join) |
startIndex | number | Start index for substring |
endIndex | number | End index for substring |
dateFormat | enum | Date format: ISO, locale, timestamp |
numberFormat | number | Decimal places (0–5) for number_format |
Output handles
| Handle | Description |
|---|---|
| Success | Transformation completed successfully |
| Error | Transformation failed (e.g., invalid input type) |
Output variables
| Variable | Type | Description |
|---|---|---|
result | any | The transformed value |
Use cases
Normalize input
Normalize input
After Speech Input, use
trim then to_lower to clean up the transcript before using it in a Condition node.Parse API response
Parse API response
After an API Call, use
json_parse to convert the response body string into an object, then use regex_extract to pull specific fields.Format currency
Format currency
Use
number_format with numberFormat: 2 to display an account balance as 1234.56 in a TTS message.