# Features & Behavior ## What it is Void isn't a static theme — it's an interactive documentation app that happens to build as plain HTML. This section documents every behavior: keyboard shortcuts, overlays, navigation, persistence, offline support, and how the theme degrades gracefully when JavaScript is unavailable. ## How it works All features are driven by `void.js` (≈5,500 lines), the theme's single-file JavaScript runtime. Every behavior is registered through an `init*()` function and called once at boot, then re-run after each SPA swap. Configuration is injected into a `