`disconnected` is a tiny (≈0.5 KB) utility that adds custom **`connected`** and **`disconnected`** events to any DOM element, allowing code to react when a node is attached to or removed from the document. It works with hyperHTML out of the box but can be used with any framework or plain JavaScript; the only required runtime pieces are a modern `Event` constructor and `WeakSet` (polyfilled for older browsers). The library is aimed at front‑end developers who need reliable lifecycle hooks for elements without writing their own mutation‑observer boilerplate.