How many types of client scripts in servicenow?

[tnjrameshbabu]

Hello Family,

Can anyone tell me how many types of client scripts are in ServiceNow?

Regards,

Rameshbabu Lakshminarayanan

[Dr Atul G- LNG]

• A Client Script is JavaScript code that runs on the client side, typically within forms, to enhance user experience and validate data before submission 1.
• There are several types of client scripts:
  • onLoad: Executes when a form is loaded, often used to manipulate the form's appearance or content. Use sparingly to avoid impacting load times.
  • onChange: Executes when a specific field's value changes, useful for responding to user input and modifying other fields dynamically.
  • onSubmit: Executes when a form is submitted, commonly used for validating field values and preventing invalid data from being saved.
  • onCellEdit: Applies to lists rather than forms and is not covered in detail in the referenced materials 2.
• Best practices for client scripting include:
  • Use scripts primarily for data validation and user feedback.
  • Minimize the number and complexity of scripts to avoid slowing down form load times.
  • Enclose code in functions, minimize server lookups, and avoid unnecessary DOM manipulation.
  • Set the execution order of scripts when needed, and consider using UI Policies for simple field attribute changes instead of scripts.
  • Restrict list editing through appropriate controls if needed, as most client scripts apply only to forms 1.
• If you need more specific guidance or examples, please specify your use case or the platform you are working with.
• For further details, refer to:
  • Client Scripting Technical Best Practices 1
  • Client Script Type

https://developer.servicenow.com/dev.do#!/learn/courses/australia/app_store_learnv2_scripting_austra...

Introduction to Client-side Scripting

Scripts in ServiceNow fall into two categories:

• Client-side
• Server-side

[Ankur Bawiskar]

@tnjrameshbabu 

This is an easy question, answer to which is easily available in docs.

Did you check there first? It would have your time and in docs there are sample codes available for each

Client scripts 

💡 If my response helped, please mark it as correct ✅ and close the thread 🔒— this helps future readers find the solution faster! 🙏

[Aditya_hublikar]

Hello @tnjrameshbabu ,

You can also refer this :

https://www.servicenow.com/community/community-central-forum/complete-guide-to-client-scripts-in-ser...

If this helps you then mark it as helpful and accept as solution.

Regards,

Aditya

[SohamTipnis]

Hi @tnjrameshbabu,

In ServiceNow, a Client Script is a piece of JavaScript code that runs strictly in the user's web browser rather than on the server. They are primarily used to manage, manipulate, and validate data directly on forms and lists to provide immediate feedback and optimize the user experience.

Types of Client Scripts: ServiceNow utilizes four core types of client scripts depending on the trigger event:

• onLoad: Runs when a form is opened and finishes rendering. Ideal for setting initial field configurations.
• onChange: Fires when a specific field value is modified. Great for dynamic lookups or calculations based on user input.
• onSubmit: Executes right before a form is saved or submitted. Best used to validate data and abort submission if entries are invalid.
• onCellEdit: Runs on list views when a user changes a cell value without opening the form.

You can also refer to the below videos and docs to know more. All the best!!!🎊

https://www.servicenow.com/docs/r/xanadu/application-development/scripts/client-scripts.html

https://www.youtube.com/watch?v=WLNQinTkLfQ

https://www.youtube.com/watch?v=WLNQinTkLfQ

https://www.youtube.com/watch?v=SCkKbdZw2aY

If you find my answer useful, please mark it as helpful and correct. ‌‌‌‌‌‌‌‌‌‌‌😊

Regards,
Soham Tipnis
ServiceNow Developer ||  Technical Consultant
LinkedIn: www.linkedin.com/in/sohamtipnis10