CSS Variables
CSS Variables, also known as CSS Custom Properties, are entities defined by CSS authors that contain specific values to be reused throughout a document. They allow developers to store values (like colors, fonts, or sizes) in named variables and reference them using the var() function, enabling dynamic theming and easier maintenance of stylesheets. This feature is part of the CSS specification and is supported in modern browsers.
Developers should learn CSS Variables to create more maintainable and scalable stylesheets, especially for large projects or design systems where consistent theming is crucial. They are ideal for implementing dynamic themes (e.g., light/dark mode), reducing code duplication, and enabling runtime style changes via JavaScript, such as in interactive web applications or user-customizable interfaces.