CSS Theme Change

CSS Theme Change is a small utility for managing CSS theme toggling (such as light/dark mode) in web projects, designed to be lightweight, easy to integrate, and framework-agnostic. Instead of relying on heavy JavaScript frameworks or complex state management, it offers a simple API that listens to system preferences and UI interactions to swap theme classes or variables in real time. It can react to user toggles as well as automatically adapt to the user’s OS-level dark/light mode settings, helping developers build interfaces that feel modern and responsive without writing boilerplate theme code. Because it abstracts away cross-browser quirks and standardizes how CSS variables or classes are applied, it saves time and reduces bugs related to inconsistent theme behavior. It’s also modular and tiny in size, meaning it can be dropped into static sites, component libraries, or SPAs without significantly increasing bundle size.