pre-exit Clean up before you exit. Installing # npm npm install -s pre-exit # yarn yarn add pre-exit Usage This package will listen on import preExit from 'pre-exit' // If there's an HTTP(S) server listening (assume that's `httpServer`)// then you probably want to close it down gracefully before shutting down the servercleanup(function closeServer() { return new Promise(resolve => { httpServer.close(resolve) })})