When discussing user interface (UI) implementations for the applications in this book, we chose not to focus on the details of the CSS styling code applied and instead relied mostly on the default Material-UI stylings. However, given that implementing any UI requires us to consider styling solutions, we will briefly look at some of the options that are available.
When it comes to adding CSS styles to the frontend, there are a number of options, each with pros and cons. In the following sections, we will discuss the two most common options, which are external style sheets and inline styles, along with the relatively newer approach of writing CSS in JavaScript, or, more specifically, JSS, which is used in Material-UI components and hence also for the applications in this book.