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Natalya Brinza Project Manager

Node.js Essentials: Keeping Its Benefits in Order


Node.js Essentials: Keeping Its Benefits in Order

Digital agencies and tech startups are all over searching Node.Js prоs and for good reason. Nowadays Node.Js is the hottest trend in the tech sphere, giving developers an opportunity to develop easily a working application that will function without any trouble. Its fan base is growing at an exponential rate! Let's try to figure out what makes the compilation distinctive and what principles are the handiest to perfect your current project.

To start with, let's discover what does Wikipedia say. Node.js is a packaged compilation of Google’s V8 JavaScript engine, the libuv platform abstraction layer, and a core library, which is itself primarily written in JavaScript. Used in server side coding, handling AJAX requests, maintaining routes for different APIs and manipulating database.

The story of Node.js starts from Ryan Dahl's decision to create real-time websites with push capability. Nobody should never have thought that the creator of Node.js was inspired by applications like Gmail. From that moment the developers have the possibility to work in the non-blocking, event-driven I/O paradigm.

node.js code

The article is about Node.js tips and tricks that are of benefit to both newbie and expert

1 Node.js is Asynchronous

Node.js is single-threaded, designed and implemented as asynchronous from top to bottom. Many developers challenged by the asynchronous property, but today it becomes easier to find the solution. When you do a time-consuming work (e.g. accessing the database), you may use a counter to keep track of the loop. Though, if you try to avoid the asynchronous method in your code, you are able to exist in an external library that has a blocking call.

Example of a well-written asynchronous file:

fs.writeFile('message.txt', 'Hello Node', function (err) {

           console.log("It's saved and the server remains responsive!");


A bad synchronous file:

fs.writeFileSync('message.txt''Hello Node');

console.log("It's saved but you just blocked ALL requests!");

2 Is it possible to handle Callback Hell?

Callback Hell is excessively nested asynchronous callbacks.The simple way to untie them is keeping to a minimum limit.

The example is:

function register(name, password, cb) {

      checkIfNameExists(name, function (err, result) {

              if (err) {

                   return cb("error");


             checkIfPasswordGood(password, function (err, result) {

                      if (err) {

                           return cb("error");


                      createAccount(name, password, function (err, result) {

                              if (err) {

                                   return cb("error");


                              createBlog(name, function (err, result) {

                                     sendEmail(name, function (err, result) {








To prevent the appearance of Callback Hell you can browse next libraries:

  • Async.js: you can execute functions in series without nesting them.
  • Bluebird: asynchronous logic will be more manageable with mapping and enqueueing.
  • Q: reveals the concept of promise to manage the nested calls effortlessly.

3 Separate Util and Config File

It should become a habit to use the util.js file when constantly work with the same functions. If you acquire this file as a variable in your module, this will reduce the number of global variables and code length, and config files that store constant parameters. Not to be hard with the code limits, keep it in the config file.

Node.js allows simple file acquiring. E.g. if you're developing a multilingual application, the best practice for you would be maintaining a “Lang” folder.

var util = require('./util.js'),

englishMessages = require('./lang/en.js');

node.js essentials

4 Look at the Monitor Performance

To be sure the app is running at optimum speed, you should always monitor its performance. Such tools like Nodefly and New Relic would help you. The first one is a simple line of code that monitors the application to detect memory leaks. New Relic is for monitoring response time to server monitoring in your real-time and data-intensive application.

5 Delegate with Granular Modules

It is definitely necessary to split codes because you'll have to work with many tables. For better convenience, you can make different modules for different tables, and for better interaction with child modules create a separate parent one.

Today the development tendency is all about creating real-time applications with the use of Node.js. A great model of deployment for APIs or networking projects, Node.js is considered to be a future for web development. Having pre-formatted asynchronous code and use of language that is easy to pick, Node.js is that choice that is definitely worth to be made.

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author Kate Sipkina Kate Sipkina
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