Is it possible to show the user some loading window to hide the loading of the application behind it when it slows down?

is it possible to show the user some loading window to hide the loading of the application behind it when it slows down?

you can always use a css loader in a pop up to overlay the page while something loads but you need to have a condition to show/hide it. For example; when page loaded entirely is no or when RG is loading, a file uploader is loading, etc. I don’t think there is a way to generally to show a loader without a specific condition.