Windows desktop web view

Hi

i have a question, what is the underlying engine that runs the web view on windows, what I mean is is the core using ie, chrome etc.

The reason I ask is that some JavaScript and css doesn’t seem to work, and it’s usually new style of JavaScript that doesn’t work.

i just need to know the underlying engine for it and version if necessary so I can get our web guys to know what they can us and not use.