# Script validators (validationScript)

Lightweight script validators are scripts that do not require connection to external services. Scripts can be written in the repository and then used on the application.

The script code should be written in **plain JavaScript (ES6 or older)**. The code must be compatible with the version of the JavaScript engine **provided by Rhino** (<http://mozilla.github.io/rhino/compat/engines.html>). Additionally **have been disabled** elements such as "eval".

{% hint style="danger" %}
**Timeout**

Note! The script execution time is limited to **1 second**to eliminate cases of an infinite loop/unbounded recursion. After one second, an exception will be thrown.
{% endhint %}

{% hint style="info" %}
Script validators are cached after being fetched. The lifetime is controlled by the configuration key **repository\_script\_validator\_cache\_ttl** and **settings\["REPOSITORY\_SCRIPT\_VALIDATOR\_CACHE\_TTL"]**
{% endhint %}


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