What Is Difference Between Client Side Scripting and Server-Side Scripting in ServiceNow?

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Angela Bailey

What Is Difference Between Client Side Scripting and Server-Side Scripting in ServiceNow?

ServiceNow is a powerful platform that allows organizations to automate their business processes and improve efficiency. One of the key features of ServiceNow is its ability to execute scripts both on the client side and on the server side. These scripts play a crucial role in customizing and extending the functionality of ServiceNow applications.

Client Side Scripting:

Client side scripting refers to the execution of scripts on the user’s browser, i.e., on the client side. This type of scripting allows for dynamic interactions and validations directly within the user interface. It helps enhance the user experience by providing real-time feedback and reducing server round-trips.

ServiceNow uses JavaScript as its primary language for client side scripting. JavaScript is a popular programming language that runs on the client’s browser and allows for manipulating web page elements, handling events, and performing calculations without requiring communication with the server.

Advantages of Client Side Scripting:

  • Improved Performance: By executing scripts locally on the client’s browser, there is reduced dependency on server communication, resulting in faster response times.
  • User-Friendly Interactions: Client side scripting enables dynamic form validations, real-time updates, and interactive features that enhance usability.
  • Data Validation: It allows for immediate validation of user input before submitting data to the server, reducing errors and ensuring data integrity.

Examples of Client Side Scripts in ServiceNow:

In ServiceNow, you can use client side scripts in various scenarios such as form validation, field visibility control, UI policy enforcement, and dynamic UI updates based on user actions.

Server-Side Scripting:

Server-side scripting refers to the execution of scripts on the server side, i., within the ServiceNow instance. This type of scripting enables more complex operations and interactions with the underlying database, business rules, and workflows.

ServiceNow uses a server-side scripting language called ‘Glide’ (GlideServerSide). Glide provides a wide range of APIs and classes that allow developers to interact with ServiceNow’s data model, business rules, and other platform functionalities.

Advantages of Server-Side Scripting:

  • Data Manipulation: Server-side scripts can perform complex data operations like querying databases, updating records, and executing business logic.
  • Access Control: Server-side scripts can enforce security restrictions and access controls to ensure proper authorization for sensitive operations.
  • Business Rule Execution: Server-side scripts are used to enforce business rules and workflows that involve multiple steps or complex logic.

Examples of Server-Side Scripts in ServiceNow:

In ServiceNow, you can use server-side scripts in various scenarios such as business rule execution, workflow automation, database queries, record updates, and integrations with external systems.

Differences between Client Side Scripting and Server-Side Scripting in ServiceNow:

Client Side Scripting Server-Side Scripting
Executed on the client’s browser Executed within the ServiceNow instance
Enhances user experience Enables complex data operations and business logic
Improves performance by reducing server round-trips Provides access control and security restrictions
Mainly uses JavaScript as the scripting language Mainly uses GlideServerSide scripting language (Glide)

In conclusion, client side scripting and server-side scripting in ServiceNow serve different purposes and have their own advantages. Client side scripting focuses on enhancing the user experience, while server-side scripting allows for more complex data operations and business logic execution. As a ServiceNow developer, understanding when to use each type of scripting is crucial for building efficient and customized applications.

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