Transitioning a React app between light and dark mode in CSS with Theme UI

Tools like Theme UI have become essential for transitioning React applications between light and dark modes, catering to user preferences for customizable interfaces. This tutorial guides the reader through building a simple React app that can switch between these modes using Theme UI, highlighting its constraint-based design principles and the powerful sx prop for inline styling. The process involves setting up a React app, installing Theme UI, creating a theme file to define color schemes, and using the ThemeProvider to wrap the app. The tutorial also illustrates how to use the useColorMode hook from Theme UI to manage color states and implement a toggle switch for mode transitions, demonstrating the seamless integration of dark mode functionality to enhance user experiences.