How does the :not selector work to block older browsers and for which browsers does it work? [closed]
How does the
selector works to block older browsers and for which browsers does it work in the following tutorial?
The CSS selector does not block browser, it's just not supported by the browser, i.e. when CSS file is being parsed by browser's built-in parser (which in turn supports certain CSS specification), unknown selectors and rules will be ignored and won't be added into styles of frames in render tree