How Can I handle window based alert

[Russ_Thomas]

That’s not an Alert and WebUI.acceptAlert() will not work.

What you’re seeing is a browser-based notification and needs to be addressed using Desired Capabilities.

@Brandon_Hein has written the manual on this:

Desired Capabilities - The Missing Manual

One of the biggest hurdles with using Katalon/Webdriver is setting the appropriate Desired Capabilities that configure various browser settings programmatically. There are a couple of reasons for this: 1.) Browsers do not expose these back-end properties in the settings menu. Instead, they offer a user-friendly GUI for configuring settings that are based on these properties. This of course makes sense for 99.9999% of browser users, but isn’t helpful for us. 2.) The appropriate Desired Capabili…

Also, for context and background:

http://forum.katalon.com/search?q=notifications%20%40Brandon_Hein