Dynamic Script Include and GlideAjax in ServiceNow: Scalable & Reusable Code for Architects

[BillMartin]

Introduction

ServiceNow developers and architects often face challenges when handling multiple AJAX calls, maintaining numerous Script Includes, and ensuring scalability. A well-designed system avoids redundant code, keeps components modular, and enhances reusability.

This article focuses on ServiceNow Service-Oriented Design (SOD) by integrating GlideAjax, Script Includes, a reusable UI script, and an entity-based approach to create a scalable and dynamic API structure in ServiceNow.

Why a Dynamic and Reusable Approach Matters

If you've had to maintain multiple AJAX requests or refactor client scripts every time the server logic changes, you know how inefficient tightly coupled systems can be. By implementing a dynamic AJAX processor, reusing UI scripts, and adopting an entity-based service design, we create a modular and adaptable solution that can scale with evolving business requirements.

Building a Scalable GlideAjax and Script Include Architecture in ServiceNow

To achieve this, the architecture consists of:

• A Reusable UI Script that centralizes all AJAX requests, making API calls consistent and easy to maintain.
• A Dynamic BaseAjaxProcessor that routes requests dynamically to the correct service, eliminating the need for multiple GlideAjax handlers.
• An Entity-Based Approach that standardizes API input/output, ensuring structured data handling across different services.
• A Service-Oriented Incident Service that separates business logic from data persistence, allowing for easier debugging and extension.

 

Key Benefits of Dynamic Script Include and GlideAjax in ServiceNow

• Scalability – New services can be integrated without modifying existing client scripts.
• Reusability – The same AJAX client and entity structure can be reused across multiple processes.
• Performance Optimization – Reducing redundant API calls results in faster execution times.
• Structured Debugging – Logs provide better visibility into API calls and error handling.
• Modular Design – Separating UI scripts, API processing, and service logic ensures long-term maintainability.

 

Final Thoughts

If you're looking for a scalable and maintainable way to handle AJAX requests in ServiceNow, a dynamic architecture combining BaseAjaxProcessor, reusable UI scripts, and an entity-based approach is the way forward.

Want to see how this works in action? Watch the full demo where I break it down step by step!

Watch the demo here: 

Have you implemented a similar approach in your ServiceNow development? Share your experiences in the comments!