Mutation events deprecation error messages

Applicability

Description

When Splunk Web is opened on Google Chrome, the mutations events deprecation error message are showing.

[Deprecation] Listener added for a 'DOMSubtreeModified' mutation event. This event type is deprecated, and will be removed from this browser VERY soon. Usage of this event listener will cause performance issues today, and represents a large risk of imminent site breakage. Consider using MutationObserver instead.

As Google released a blog stating that mutations events will be removed from Chrome. Mutation events will be removed from Chrome

The concern is when Google Chrome gets an update on 23rd July 2024, it will stop supporting the specified mutation events going further after 23rd July 2024, there might be an issue with accessing Splunk Web from Google Chrome. 

Investigation

The issue was noticed in the following versions :- : 9.0.2, 9.0.8, 9.1.3, 9.2.1

It can be evaluated by following the steps outlined below - 

1. Create a Classic Dashboard on Splunk UI with any of the following versions mentioned above and use the content of XML logs.txt as the source code.

2. Open a Chrome browser and launch the Developer Tools, specifically, the Console tab.

3. Open/refresh the created dashboard and notice the following warning would appear.

Resolution

It is a minor cosmetic issue and has no impact. The end-user can safely ignore the warnings at the console. 

Related Links

Mutation events will be removed from Chrome