Why should you use a UI Policy over a Client Script when possible?

Using a UI Policy over a Client Script is beneficial for several reasons, particularly in terms of performance and ease of use in controlling the user interface. The correct answer centers around one of the core advantages of UI Policies, which is their ability to operate more efficiently in many cases than Client Scripts.

UI Policies are designed to apply specific actions to form fields based on certain conditions, and they operate natively within the platform without requiring explicit JavaScript coding. This reduces the chance of making scripting errors, making UI Policies easier to implement and maintain compared to writing Client Scripts, which require more detailed knowledge of JavaScript and can introduce complexity and potential bugs.

Furthermore, UI Policies execute on the client side and utilize a more streamlined approach for changing field properties, like visibility or mandatory status, which can lead to faster processing times. This can significantly enhance user experience during form interactions by reducing delays that might arise when using more complex Client Scripts.

By opting for UI Policies when the functionality allows, you can simplify the logic needed for field manipulation while maintaining performance, making it a preferred choice for controlling field attributes on forms within the ServiceNow platform.