Script Include Development

Overview

Script Includes are the foundation of reusable server-side code in ServiceNow. This skill covers:

• Class-based script include architecture
• Client-callable script includes (GlideAjax pattern)
• Extending and inheriting from existing classes
• Prototype patterns and object-oriented design
• Utility libraries and helper functions
• When to use script includes vs business rules
• Scoped vs global considerations
• Design patterns (Singleton, Factory, Strategy)
• Unit testing script includes with ATF

When to use Script Includes:

• Reusable logic needed across multiple business rules, workflows, or UI actions
• Complex business logic that needs unit testing