---
sourceDocument: Brazil API Reference
sourceDocumentLink: https://www.servicenow.com/docs/r/api-reference

 Release :

    - brazil

ft:locale :

    - en-US

ft:publication_title :

    - Brazil API Reference

ft:clusterId :

    - crapiref

bundleId :

    - crapiref

workflow :

    - Creator


---

# JavaScript debug window

# JavaScript debug window {#ariaid-title1}

Release version: Brazil  
Updated September 10, 2026  
![](https://www.servicenow.com/docs/portal-asset/ico-clock) 1 minute to read  
The JavaScript debug window appears in a bottom pane of the user interface when an
administrator turns on debugging.  
Note:  
The JavaScript debug window is not supported with Next Experience. For more information about supported features in Next Experience, see [Considerations for activating Next Experience](https://www.servicenow.com/docs/access?context=next-experience-adoption-paths&version=brazil&pubname=brazil-platform-user-interface&ft:locale=en-US).

Use the debug window to access these tools.

* JavaScript Log: JavaScript that runs on the browser, such as client scripts, can include a call to jslog() to send information to the JavaScript log.
* Field Watcher: a tool that tracks and displays all actions that the system performs on a selected form field.
* **[Access the JavaScript debug window](https://www.servicenow.com/docs/qf4wCY0LUHjzcm_XwCYF0A)**   
  The JavaScript debug window enables access to the JavaScript Log and the Field Watcher tools.
* **[Watching fields](https://www.servicenow.com/docs/~_CBcvxaP2CYWgB1eJBoVw#c_FieldWatcher)**   
  The field watcher tool tracks and displays all actions that the system performs on a selected form field.
* **[Writing to the debug log](https://www.servicenow.com/docs/aErfKfQiwZ4WPBU_IYsb1w#c_WritingToTheDebugLog)**   
  To write to the debug log in your client-side JavaScript, or UI policies, make a call to the global function `jslog()`.