names, or internal IDs DOM is different across browsers or framework versions • Never make selectors too speciﬁc When you change your views, the styling would break • Create your own CSS classes on components Your code is future proof
> Performance reasons. The Modern (Sencha Touch) toolkit, has a layout engine which uses CSS3 i.s.o. JS. Will the modern toolkit / themes have RTL? > Not at release. But eventually. I didn’t see the Tizen theme listed. Did we drop it? > Not oﬃcially. It’s just not there yet. On request we will add it. Will the new Classic theme, extend from Neptune and have the same vars? > Yes.