Events & Error Handling

What does this output?

const EventEmitter = require("events")
const emitter = new EventEmitter()
emitter.on("greet", (name) => {
  console.log("Hello,", name)
})
emitter.emit("greet", "Rahul")

What is the difference between .on() and .once()?

An uncaught exception in Node.js will crash the entire process.