Is there a way to tell browser to not used the cached CSS? For instance, browsers, depending on different criteria, will keep using the cached CSS until you clear history and cahces. After you do this clear, it will use the new CSS values. The closest I have seen, for websites in general, is at https://www.impressivewebs.com/force-browser-newest-stylesheet/, where we basically play a trick and add a query screen to the inclusion of the CSS. But this won’t work with Vaadin 7 ( or later, I imagine ).
There has been an enhancement ticket about this already for a while