The **wherearewe** package provides a lightweight utility that inspects the runtime and reports a set of boolean flags indicating whether the code is running in a test harness, Node.js, a browser main thread, a web worker, an Electron process (main or renderer), or any environment with a DOM. It’s aimed at JavaScript/TypeScript developers who need reliable, cross‑environment detection to adapt their libraries or applications for Node, browsers, Electron, or workers.