---
title: JavaScript debug window
description: The JavaScript debug window appears in a bottom pane of the user interface when an administrator turns on debugging.
locale: en-US
canonical_url: https://www.servicenow.com/docs/r/australia/api-reference/scripts/c\_JavaScriptDebugWindow.html
release: australia
product: Scripts
classification: scripts
topic_type: concept
last_updated: "2026-03-12"
reading_time_minutes: 1
breadcrumb: [Debugging scripts, Scripting, API implementation, API implementation and reference]
---

# JavaScript debug window

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://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/platform-user-interface/next-experience-adoption-paths.md).

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://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/api-reference/scripts/t_UsingTheJavaScriptDebugWindow.md)**  
The JavaScript debug window enables access to the JavaScript Log and the Field Watcher tools.
-   **[Watching fields](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/api-reference/scripts/c_FieldWatcher.md)**  
The field watcher tool tracks and displays all actions that the system performs on a selected form field.
-   **[Writing to the debug log](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/api-reference/scripts/c_WritingToTheDebugLog.md)**  
To write to the debug log in your client-side JavaScript, or UI policies, make a call to the global function `jslog()`.

**Parent Topic:**[Debugging scripts](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/api-reference/scripts/script-debug-overview.md)