# Overview

The server has a built-in engine for running JS scripts that supports the ECMAScript 5 specification. The script manager provides a flexible mechanism for converting data received, for example, from a Modbus device and presenting them as OPC UA variables or time series.

### Key Features <a href="#h.omjuh8c18pvw" id="h.omjuh8c18pvw"></a>

* Formula between tags.
* Mathematical functions and number conversion to and from bytes.
* Operators of conditional statements (if-else) and cycles (for, while).
* Working with numbers, strings, date and time, arrays and dictionaries (hashtables).
* Re-use of code (modules).
* OPC UA Methods.


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.monokot.io/scripts/overview.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.