Node JS - Starting a new project - Revision history

AliIybar at 13:37, 5 June 2020

2020-06-05T13:37:09Z

2020-06-04T18:46:34Z

2018-09-16T19:22:22Z

2018-01-24T11:27:15Z

Created page with "Category:Node.js npm init"

New page

[[Category:Node.js]]

npm init

← Older revision		Revision as of 13:37, 5 June 2020
Line 6:		Line 6:
	install this package to avoid stop - start application on every change		install this package to avoid stop - start application on every change
	and instead of node start application with nodemon		and instead of node start application with nodemon
		+
		+	Path
		+	var pathObj = path.parse(__filename);
		+
		+
		+	Template String in ES6
		+	console.log(`Total Memory : ${totalMemory}`;
		+
		+	== EventEmitter ==
		+	const EventEmitter = require('events');
		+	const emitter = new EventEmitter();
		+
		+	//Register a listener
		+	emitter.on('messageLogged', function(){
		+	console.log('Listener called')
		+	})
		+
		+	//Raise an event
		+	emitter.emit('messageLogged');
		+
		+	listener registration must be done before it raised
		+
		+	if we want to pass event arguments we raise like
		+	emitter.emit('messageLogged', {id:1, url:'http://'});
		+
		+	and get it like
		+	emitter.on('messageLogged', function(arg){
		+	=== Better Usage ===
		+	logger.js
		+	<pre>
		+	const EventEmitter = require('events');
		+
		+	class Logger extends EventEmitter{
		+	log(message){
		+	console.log(message);
		+	this.emit('messgeLogged', {id:1, url:'http://'});
		+	}
		+	}
		+	module.exports = Logger;
		+	</pre>
		+	app.js
		+	<pre>
		+	const EventEmitter = require('events');
		+	const Logger = require('./logger');
		+	const logger = new Logger();
		+
		+	logger.on('messageLogged', (arg) => {
		+	console.log('Listener called ', arg);
		+	});
		+	logger.log('Message');
		+
		+	</pre>

@@ Line 1: / Line 1: @@
 [[Category:Node.js]]
-  npm init
+  npm init --yes
 == installing NodeMon ==
   npm i -g nodemon
 install this package to avoid stop - start application on every change
 and instead of node start application with nodemon

← Older revision		Revision as of 19:22, 16 September 2018
Line 2:		Line 2:

	npm init		npm init
		+	== installing NodeMon ==
		+	npm i -g nodemon
		+	install this package to avoid stop - start application on every change
		+	and instead of node start application with nodemon