Dark mode in React: An in-depth guide

Dark mode in web applications, particularly in React, has become a popular feature due to its benefits in accessibility, eye strain reduction, and battery life conservation, while also offering a modern aesthetic appeal. Implementing dark mode involves more than a simple toggle button and requires careful management of CSS variables to create a seamless user experience. Developers can utilize system settings to align the app's theme with the device's preferences using media queries, while a color scheme toggle in React can be implemented with useState and useMediaQuery hooks to provide user customization. To maintain user preferences across sessions, the use-persisted-state hook is recommended for storing dark mode settings in localStorage. Additionally, careful selection of theme colors and handling of images can ensure accessibility and visual comfort. Testing for dark mode, especially when it holds significant importance in UX or accessibility compliance, is advised to ensure a robust and reliable implementation.