Fela VS styled-components

[Fela](https://fela.js.org/) and [Griffel](https://github.com/microsoft/griffel) are also not bad choice.

Speaking of libraries and implementation. I implemented themes for white label (and not only) on UI via styles as a function of state on UI. I used https://fela.js.org/ for this. So basically, when a React app initializes, a part of the state is initialized (via identity of a user, like email they log in or meta info, or additional API call, or via URL) with a value telling if it's a partner X vs partner Y vs your own brand. Then the styles that have colours, backgrounds, borders, box-shadows, fonts are applied by fela. So I created a bunch of styled components like buttons, toggles, styled divs, etc and each of them has access to that piece of state holding the UI theme, and depending on that theme, it will apply CSS classes in the runtime. You can use the same mechanism to implement multiple themes for your own brand (not just light/dark modes). The only thing you need to manually code is a JSON spec for themes like:

CSS-in-JS is a styling technique wherein CSS is composed using JavaScript instead of defined in external files. This method allows CSS to be scoped locally to components rather than globally, reducing the probability of style conflicts. Utilizing JavaScript also enables dynamic styling easily aligned with the component's state or props. Libraries like Styled Components and Emotion are popular choices in the React ecosystem for adopting this method.

In 2023, I had a chat with Max Stoiber, CEO of Stellate, on a podcast to learn about his early success on GitHub. His first open-source project, react-boilerplate/react-boilerplate, gained a whopping 10k stars in just one weekend after appearing on the homepage of Hacker News. This success led Max to drop out of university and create several other popular open-source projects, including styled-components. This library accelerates the process of building styles in React components.

Embracing the styled-components library allows developers to write actual CSS code to style their components. It utilizes tagged template literals to style components, enabling a seamless integration of styles within the component's JavaScript file. This approach eliminates the mapping between components and styles, thus enhancing developer productivity and component reusability.

styled-components: Allows for maintainable styling with CSS-in-JS. Learn more

Over the past few years, I've worked with React apps utilising various CSS-in-JS libraries, starting with styled-components, transitioning through emotion, Theme UI, and finally Stitches. I've also integrated MUI, Mantine, and Chakra in numerous client projects.

There are several alternatives to MUI. shadcn/ui is a modern alternative that is very popular. Ant Design is also a great alternative. Charkra UI can also be used as a UI Framework. Some people suggest just using styled components. Some use Tailwind CSS. Yet, for both styled components and Tailwind CSS, one still writes a lot of CSS. This might not provide the best developer experience compared to using a UI Framework, especially if we aim to avoid designing all the pages on the website.

Website: Styled Components

The project is build using several ready made components available within, Mantine. It’s a fully featured React components library. However some places still use some custom CSS-in-JS so we used some good ol’ styled components.