ThemeType function conversion

[sync-by-unito]

To take advantage of strongly-typed class names, all ClassesType component arguments should become ClassesType<typeof styles>, and to make this work all styles functions should infer their own return type instead of manually declaring a JssStyles return type, (so const styles = (theme: ThemeType): JssStyles => ({ should become const styles = (theme: ThemeType) => ({). Once all components have been converted we should remove the default gereric argument for ClassesType to ensure all future components take advatage of the strong typing.

┆Issue is synchronized with this Asana task by Unito

[sync-by-unito]

➤ JP Addison commented:

Ollie Etherington I realized I'm not actually sure how theme functions should be typed, and couldn't immediately find the answer. Could you edit this ticket to have the right description and title for "properly type all the style functions"?