Load Spinner global on combobox loading

How I can show a loading spinner on the main view if I will load a data set into a combobox?

Hello,
It depends on what moment you want the data to load.
I made a sample, where loading the data in combo starts after rendering with the help of onAfterRender event. So when the data was loaded the progress icon disappear.
https://snippet.webix.com/9qnmk3ll