In the SPFx JQuery tutorial there is this instruction :-
For drop 1, there is a workaround needed when loading css files (later on in this tutorial we will show you how). For now, you need to include one other typing
tsd install combokeys --save
When I have finished adding all of the code in the instructions there is no other references to this workaround and I get a failure :-
import styles from './JQuery.module.scss'; - cannot find module ./JQuery.module.scss