React-JSS

React-JSS allows you to style components using Javascript syntax to define your styling.

injectSheet

This function is used to apply a JS stylesheet to a component. It is applied using the following implementation:

const styledComponent = injectSheet([JS stylesheet you have imported])([Functional component you want to style])

jss.use()

Don't understand this one This function allows you to use plugins. You can use hooks inside the use() function to impact the styling in some way (??)