1) The document discusses using JavaScript on Java servers for scalable applications. It introduces jWebSocket, an open-source framework that allows building high-performance clustered applications using Java and JavaScript. 2) jWebSocket allows creating JavaScript applications that run on the jWebSocket communication backbone and benefit from features like automatic client-side generation, hot reloading, and integration with services like MongoDB. 3) A live demo is presented of creating a simple CRUD application in JavaScript using jWebSocket's scripting plugin and reloading code changes in real-time.