Your own code

The Code Execution module in the Multogram Modules Constructor: built-in JavaScript, Python, Node.js, CMD, Bash and PowerShell. How variables and resources are inserted, how to return a result, packages.

If a ready-made action isn't enough, write a piece of code — the Code Execution module runs it right in the scenario.

Languages

Action	Language	When to choose it
Execute JavaScript (ECMA)	Built-in JavaScript	Calculations and data processing. Nothing to install; no `require`, Node.js modules or asynchrony
Execute Python	Python	Python libraries, complex processing
Execute Node.js	Node.js	npm packages, familiar JavaScript
Execute CMD, Execute PowerShell, Execute Bash	Command shells	System commands and scripts

Packages are installed with the Install Python Package and Install Node.js Package actions and removed with the matching actions. Python and Node.js must be installed on the module user's computer; the built-in JavaScript needs nothing — choose it for modules you hand out.

Variables and resources in code

Before running, [[variables]] and {{resources}} are inserted into the code according to where they are:

Where the reference is	What is inserted	Example
In the code	A value of its own type: text in quotes, a number, an object	`var n = [[count]];` → `var n = 5;`
Inside a quoted string	Just text, without extra quotes	`print("phone=[[phone]]")` → `print("phone=79000000000")`

Write [[x]] right in the code to get the value; put it in quotes only if you need it as text. References in comments are not inserted.

A typo in a name won't cause an error

A non-existent variable turns into null (in Python — None), and execution continues. If the result is odd, check the names first.

How to return a result

The program's output (print(...), console.log(...)) goes into the action's result variable.
An assignment [[name]] = value right in the code creates or changes a scenario variable — objects and arrays are saved as they are. Works in Python, Node.js and the built-in JavaScript.

Execute JavaScript (ECMA)

var digits = ('' + [[phoneInput]]).replace(/[^0-9]/g, '');
[[phone]] = { ok: digits !== '', value: digits };
print(digits ? '+' + digits : 'EMPTY');

After this action the scenario has a [[phone]] object with the ok and value fields, and the result variable holds the printed string.

When you don't need code

A lot is already available as ready-made actions: strings, JSON, regular expressions, math, date and time — see Modules and actions. Ready-made actions are easier to read and check; leave code for what they can't express.

Updated October 9, 2026