Last Updated: 25 May 2023 08:22 by Johnny
Created on: 10 Aug 2018 08:41
Category: Grid
Type: Bug Report
[Intervention] Unable to preventDefault inside passive event listener due to target being treated as passive error when scrolling in Chrome
When scroll inside RadGrid in Chrome on a mobile device or in the DevTools responsive/mobile mode, the browser throws [Intervention] Unable to preventDefault inside passive event listener due to target being treated as passive. See I get 1 error message for every pixel the grid scrolls. 

The problem is due to jQuery and is reproducible with 1.12.4 and 3.3.1 versions of it.
Posted on: 25 May 2023 08:22

Yes, thank you, Rumen. I believe that in my previous comment, I was mainly referring to the bad behavior that takes place when trying to scroll, which is of course accompanied by this console error message. I left the comment to maybe help you guys be aware.

However, later on, I had this idea about the console message clarified in one of my support tickets.

Thanks and have a great day!

Posted on: 25 May 2023 08:08

Hi Johnny,

The errors you see in the console about "Unable to preventDefault inside passive event listener" are expected to happen because touch events are passive and the browsers complain is they are prevented, however, it has no negative impact on the environment. The way ASP.NET WebForms components were designed, preventing the events is necessary, therefore we cannot remove those lines.

Progress Telerik

Heads up! Telerik UI for ASP.NET AJAX versions for .NET 3.5 and 4.0 are retired. Progress will continue shipping assemblies compatible with .NET 4.5 and later. See whether this affects your apps in this article.
Posted on: 19 May 2023 09:00
I do hope that this can be resolved, still experiencing this until now.