node.js: emitter.emit(eventName[, ...args])

This function calls all the listeners registered for this event synchronously.

Below table summarizes the arguments of emit function.

Argument	Type	Description
eventName	String	Specify the event name.
args	Any	Arguments passed to listener function

This method returns true if the event had listeners, false otherwise.

HelloWorld.js

var EventEmitter = require('events').EventEmitter;

var emitter = new EventEmitter();

emitter.on("welcome", (name) => {
 console.log("Hello Mr.%s", name);
});

emitter.on("welcome", (firstName, lastName) => {
 console.log("Good Morning Mr.%s %s", firstName, lastName);
});

emitter.emit("welcome", "krishna", "Ponnam");

Output

Hello Mr.krishna

Good Morning Mr.krishna Ponnam

Previous                                                 Next                                                 Home