What is Script Include?

A Script Include in ServiceNow is a reusable piece of server-side JavaScript code that can be called from other scripts, such as business rules, client scripts, or other script includes. They encapsulate logic and promote code reuse, maintainability, and modularity. They are commonly used to define functions or classes that can be invoked from various parts of the ServiceNow platform to perform specific tasks, calculations, or data manipulations. This approach avoids redundant code and simplifies the development process. They are typically called asynchronously.