Shubham Ankit

Shubham Ankit

1566615432

A Guide to Node.js Logging

Originally published by  DOMINIK KUNDEL at  twilio.com

When you start developing in JavaScript one of the first things you'll probably learn is how to log things to the console using console.log. If you search on how to debug JavaScript you'll find hundreds of blog posts and StackOverflow articles pointing you to "simply" console.log it. And because it's such a common practice we even started having linter rules like no-console to make sure we don't leave accidental log statements in our production code. But what if we actually want to log something intentionally to provide more information?

In this blog post we'll look at various situations where you want to log info, what the difference between console.log and console.error in Node.js is, and how you can ship logging in your libraries without cluttering the users console.

console.log(`Let's go!`);

Theory First: Important Details for Node.js

While you are able to use console.log or console.error in the browser as well as Node.js, there's an important thing to keep in mind when using Node.js. When you write the following code in Node.js in a file called index.js:

console.log('Hello there');
console.error('Bye bye');

And execute it in the terminal using node index.js you'll see the output of the two directly under each other:

However, while those two might look the same, they are actually treated by the system differently. If you check the console section of the Node.js documentation you'll see that console.log is printing to stdoutwhile console.error uses stderr.

Every process has three default streams that it can work with. Those are stdinstdout and stderr. The stdin stream is handling the input that comes to your process. For example button presses or a redirected output (we'll get to that in a second). The stdout stream is meant for your application’s output. Lastly stderr is meant for error messages. If you want to understand why stderr exists and when to use it, check out this article.

In a nutshell, this allows us to use the redirect (>) and pipe (|) operators to work with error and diagnostic information separate from the actual outcome of an application. While > allows us to redirect the output of a command into a file, 2> allows us to redirect the output of stderr into a file. For example, this command would pipe "Hello there" into a file called hello.log and "Bye bye" into a file called error.log.

node index.js > hello.log 2> error.log

When Do You Want to Log?

Now that we've learned a bit about the underlying tech aspect of logging, let's talk a bit about different use cases where you might want to log something. Typically these use cases fall into one of the following categories:

We'll skip the first two in this blog post and will focus on the three Node.js based ones.

Your Server Application Logs

There's a variety of reasons why you might want to log things on your server. Logging incoming requests for example allows you to extract things like statistics out of it, such as how many 404s users are hitting, what those might be or what User-Agent is being used. And you also want to know when stuff went wrong and why.

If you want to try out the things following in this part of the post, make sure to create a new project directory. Create an index.js in the project directory for the code we'll use and run the following to initialize a project and install express:

npm init -y
npm install express

Let's set up a server with a middleware that just console.log every request for you. Place the following into the index.js file:

const express = require('express');
 
const PORT = process.env.PORT || 3000;
const app = express();
 
app.use((req, res, next) => {
 console.log('%O', req);
 next();
});
 
app.get('/', (req, res) => {
 res.send('Hello World');
});
 
app.listen(PORT, () => {
 console.log('Server running on port %d', PORT);
});

We are using console.log('%O', req) here to log the entire object. console.log uses util.format under the hood that supports additionally to %O other placeholders. You can read about them in the Node.js documentation.

When you run node index.js to execute your server and navigate to http://localhost:3000 you'll notice that it will print a lot of information that we don't really need.

If you change it to console.log('%s', req) to not print the entire object we'll not get much information either

We could write our own log function that only prints the things we care about, but let's first take a step back and talk about what we typically care about. While the message often stands in the center of our attention, in reality there's often additional info that we might need. Information such as:

  • Timestamp - to know when things happened
  • Computer/Server Name - in case you are running a distributed system
  • Process ID - in case you are running multiple Node processes using something like pm2
  • Message - an actual message with some content
  • Stack Trace - in case we are logging an error
  • Maybe some additional variables/info

Additionally, now that we know that everything goes to stdout and stderr anyways, we would probably want different log levels and the ability to configure and filter our logs by them.

We can get all of that through accessing various parts of process and writing a bunch of JavaScript but the best thing about Node.js is that we got the npm ecosystem and there are a variety of libraries already out there for us to use. A few of those are:

I personally like pino because it's fast and has a nice ecosystem. Let's see how using pino can help us with logging. The neat thing is that there's already a express-pino-logger package that we can use to log the requests.

Install both pino and express-pino-logger:

npm install pino express-pino-logger

Afterwards update your index.js file to use the logger and middleware:

const express = require('express');
const pino = require('pino');
const expressPino = require('express-pino-logger');
 
const logger = pino({ level: process.env.LOG_LEVEL || 'info' });
const expressLogger = expressPino({ logger });
 
const PORT = process.env.PORT || 3000;
const app = express();
 
app.use(expressLogger);
 
app.get('/', (req, res) => {
 logger.debug('Calling res.send');
 res.send('Hello World');
});
 
app.listen(PORT, () => {
 logger.info('Server running on port %d', PORT);
});

In this snippet we created a logger instance of pino and passed it into the express-pino-logger to create a new logger middleware to call app.use with. Additionally we replaced the console.log on server start-up with logger.info and added an additional logger.debug to our route to show different log-levels.

If you restart your server by running again node index.js, you see a quite different output that prints a JSON for every line. Navigate to http://localhost:3000 again and you see another line of JSON added.

If you inspect this JSON you'll see that it holds all the previously mentioned information like e.g. a timestamp. You might also notice that our logger.debug statement is not printed. That's because we have to change our default log-level to make it visible. When we created our logger instance we set the value to process.env.LOG_LEVEL which means that we can change the value through that, or accept the default of info. By running LOG_LEVEL=debug node index.js we can adjust the log level.

Before we do that, let's address the fact that the output right now is not really human readable right now. That's intentional. pino follows a philosophy that for the sake of performance, you should move any processing of the logs into a separate process by piping (using |) the output. This includes making it human readable or uploading it to a cloud host. These are called transports. Check out the documentation ontransports to also learn about why errors in pino are not written to stderr.

Let's use the tool pino-pretty to look at a more readable version of the logs. Run in your terminal:

npm install --save-dev pino-pretty
LOG_LEVEL=debug node index.js | ./node_modules/.bin/pino-pretty

All your logs will now be piped using the | operator into the pino-pretty command and your output should be cleaned up to contain crucial info and should be colored. If you request http://localhost:3000 again you should also see your debug message.

There's a variety of existing transports to prettify or transform your logs. You could even display them with emojis using pino-colada. These will be useful for your local development. Once you are running your server in production you might want to pipe your logs into another transport , write them to disk using > to process them later or do both using a command like tee.

The documentation will also contain info on things such as rotating log files, filtering and writing logs to different files.

Your Library Logs

Now that we looked at how we can write logs efficiently for our server applications, why not use the same technology for the libraries that we author?

The problem is that your library might want to log things for debugging purposes but really shouldn't clutter the application of the consumer. Instead the consumer should be able to enable the logs if they need to debug something. Your library should be silent by default and leave writing output to the user.

A good example for this is express. There's lots of things going on under the hood of express and you might want to take a peek under the hood when you debug your application. If we consult the expressdocumentation you'll notice that you can prepend a DEBUG=express:* to your command like so:

DEBUG=express:* node index.js

If you run the command with an existing app you'll see lots of additional output that will help you debug your issue.

If you didn’t enable debug logging, you'll not see any of this. This is done through a package fittingly called debug. It allows us to write messages under a "namespace" and if the user of the library includes the namespace or a wildcard that matches it in their DEBUG environment variable, it will output these. To use the debug library, first install it:

npm install debug

Let's try it by creating a new file that will simulate our library called random-id.js and place the following code in it:

const debug = require('debug');
 
const log = debug('mylib:randomid');
 
log('Library loaded');
 
function getRandomId() {
 log('Computing random ID');
 const outcome = Math.random()
   .toString(36)
   .substr(2);
 log('Random ID is "%s"', outcome);
 return outcome;
}
 
module.exports = { getRandomId };

This creates a new debug logger with the namespace mylib:randomid and then logs two messages to it. Let's use it in our index.js from the previous chapter:

const express = require('express');
const pino = require('pino');
const expressPino = require('express-pino-logger');
 
const randomId = require('./random-id');
 
const logger = pino({ level: process.env.LOG_LEVEL || 'info' });
const expressLogger = expressPino({ logger });
 
const PORT = process.env.PORT || 3000;
const app = express();
 
app.use(expressLogger);
 
app.get('/', (req, res) => {
 logger.debug('Calling res.send');
 const id = randomId.getRandomId();
 res.send(`Hello World [${id}]`);
});
 
app.listen(PORT, () => {
 logger.info('Server running on port %d', PORT);
});

If you re-run the server but this time with DEBUG=mylib:randomid node index.js it prints the debug logs for our 'library".

The neat thing is that if the users of your library want to place this debug info into their pino logs, they can use a library called pino-debug by the pino team to properly format those logs.

Install the library using:

npm install pino-debug

pino-debug needs to be initialized before our first use of debug. The easiest way to do this is to use the -ror --require flag of Node.js to require the module before starting our script. Re-run your server with a command like the following (assuming you installed pino-colada) :

DEBUG=mylib:randomid node -r pino-debug index.js | ./node_modules/.bin/pino-colada

You'll now see your debug logs of the library in the same format as your application logs.

Your CLI Output

The last case we'll cover in this blog post is the special case of logging for CLIs rather than libraries. My philosophy here is to keep the logic-logs separate from your CLI output "logs". For any logic logs, you should use a library like debug. That way you or others can re-use the logic without being bound by the specific use-case of your CLI.

When you build a CLI with Node.js you might want to make things look pretty by adding colors, spinners or formatting things in a particular visually-appealing way. However, when you build your CLI, there are a few scenarios you should keep in mind.

One scenario is that your CLI might be used in the context of a Continuous Integration (CI) system and therefore you might want to drop the colors or any fancy decorative output. Some CI systems set an environment flag called CI. If you want to be more on the safe side to check if you are in a CI is by using a package like is-ci that already has support for a bunch of CI systems.

Some libraries like chalk already detect CIs for you and drop the colors for you. Let's take a look at how this looks like.

Install chalk using npm install chalk and create a file called cli.js. Place the following into it:

const chalk = require('chalk');

console.log(‘%s Hi there’, chalk.cyan(‘INFO’));

Now if you would run this script using node cli.js you’ll see colored output.

But if you run it with CI=true node cli.js you’ll see that the color is suppressed:

The other scenario you want to keep in mind is if your stdout is running in a terminal mode. Meaning the content written to a terminal. If that’s the case we can show all the pretty output using things like boxen. If it’s not, it’s likely that the output is being redirected into a file or piped somewhere.

You can check ifstdinstdout or stderr are in terminal mode by checking the isTTY attribute on the respective stream. For example: process.stdout.isTTYTTY stands for “teletypewriter” and in this case specifically for Terminal.

The values can differ for each of the three streams depending on how the Node.js process has been started. You can read more about it in the “process I/O” section of the Node.js documentation.

Let’s see how the value of process.stdout.isTTY varies in different situations. Update your cli.js file to check for it:

const chalk = require(‘chalk’);
 
console.log(process.stdout.isTTY);
console.log(‘%s Hi there’, chalk.cyan(‘INFO’));

Now run node cli.js in your terminal and you see true printed followed by our colored message.

Afterwards run the same thing but redirect the output to a file and inspect the content afterwards by running:

node cli.js > output.log
cat output.log

You’ll see that this time it printed undefined followed by a plain uncolored message because the redirect of the stdout turned off the terminal mode of stdout. Since chalk uses supports-color which under the hood checks among other things for isTTY on the respective stream.

Tools like chalk take care of this behavior for you already, however, when you develop a CLI you should always be aware of situations where your CLI might run in CI mode or where the output is redirected. It can also help you take the experience of your CLI one step further. For example you can arrange your data in a pretty fashion in the terminal and if isTTY is undefined you switch to a way that is easier to parse.

In Summary

Getting started with JavaScript and logging your first line using console.log is quick, but when you take your code to production, there’s much more you should consider about logging. This post is purely an introduction into the various ways and available logging solutions. It doesn’t contain everything you need to know. I recommend you to check out some of your favorite open source projects to see how they solve the logging problems and which tools they use. Now go and log all the things and just don’t print your logs

If you know or find any tools that I should definitely mention or if you have any questions, feel free to drop me a line. I can’t wait to see what you build.

Originally published by  DOMINIK KUNDEL at  twilio.com

=============================

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What is GEEK

Buddha Community

A Guide to Node.js Logging

Nice article I like it

NBB: Ad-hoc CLJS Scripting on Node.js

Nbb

Not babashka. Node.js babashka!?

Ad-hoc CLJS scripting on Node.js.

Status

Experimental. Please report issues here.

Goals and features

Nbb's main goal is to make it easy to get started with ad hoc CLJS scripting on Node.js.

Additional goals and features are:

  • Fast startup without relying on a custom version of Node.js.
  • Small artifact (current size is around 1.2MB).
  • First class macros.
  • Support building small TUI apps using Reagent.
  • Complement babashka with libraries from the Node.js ecosystem.

Requirements

Nbb requires Node.js v12 or newer.

How does this tool work?

CLJS code is evaluated through SCI, the same interpreter that powers babashka. Because SCI works with advanced compilation, the bundle size, especially when combined with other dependencies, is smaller than what you get with self-hosted CLJS. That makes startup faster. The trade-off is that execution is less performant and that only a subset of CLJS is available (e.g. no deftype, yet).

Usage

Install nbb from NPM:

$ npm install nbb -g

Omit -g for a local install.

Try out an expression:

$ nbb -e '(+ 1 2 3)'
6

And then install some other NPM libraries to use in the script. E.g.:

$ npm install csv-parse shelljs zx

Create a script which uses the NPM libraries:

(ns script
  (:require ["csv-parse/lib/sync$default" :as csv-parse]
            ["fs" :as fs]
            ["path" :as path]
            ["shelljs$default" :as sh]
            ["term-size$default" :as term-size]
            ["zx$default" :as zx]
            ["zx$fs" :as zxfs]
            [nbb.core :refer [*file*]]))

(prn (path/resolve "."))

(prn (term-size))

(println (count (str (fs/readFileSync *file*))))

(prn (sh/ls "."))

(prn (csv-parse "foo,bar"))

(prn (zxfs/existsSync *file*))

(zx/$ #js ["ls"])

Call the script:

$ nbb script.cljs
"/private/tmp/test-script"
#js {:columns 216, :rows 47}
510
#js ["node_modules" "package-lock.json" "package.json" "script.cljs"]
#js [#js ["foo" "bar"]]
true
$ ls
node_modules
package-lock.json
package.json
script.cljs

Macros

Nbb has first class support for macros: you can define them right inside your .cljs file, like you are used to from JVM Clojure. Consider the plet macro to make working with promises more palatable:

(defmacro plet
  [bindings & body]
  (let [binding-pairs (reverse (partition 2 bindings))
        body (cons 'do body)]
    (reduce (fn [body [sym expr]]
              (let [expr (list '.resolve 'js/Promise expr)]
                (list '.then expr (list 'clojure.core/fn (vector sym)
                                        body))))
            body
            binding-pairs)))

Using this macro we can look async code more like sync code. Consider this puppeteer example:

(-> (.launch puppeteer)
      (.then (fn [browser]
               (-> (.newPage browser)
                   (.then (fn [page]
                            (-> (.goto page "https://clojure.org")
                                (.then #(.screenshot page #js{:path "screenshot.png"}))
                                (.catch #(js/console.log %))
                                (.then #(.close browser)))))))))

Using plet this becomes:

(plet [browser (.launch puppeteer)
       page (.newPage browser)
       _ (.goto page "https://clojure.org")
       _ (-> (.screenshot page #js{:path "screenshot.png"})
             (.catch #(js/console.log %)))]
      (.close browser))

See the puppeteer example for the full code.

Since v0.0.36, nbb includes promesa which is a library to deal with promises. The above plet macro is similar to promesa.core/let.

Startup time

$ time nbb -e '(+ 1 2 3)'
6
nbb -e '(+ 1 2 3)'   0.17s  user 0.02s system 109% cpu 0.168 total

The baseline startup time for a script is about 170ms seconds on my laptop. When invoked via npx this adds another 300ms or so, so for faster startup, either use a globally installed nbb or use $(npm bin)/nbb script.cljs to bypass npx.

Dependencies

NPM dependencies

Nbb does not depend on any NPM dependencies. All NPM libraries loaded by a script are resolved relative to that script. When using the Reagent module, React is resolved in the same way as any other NPM library.

Classpath

To load .cljs files from local paths or dependencies, you can use the --classpath argument. The current dir is added to the classpath automatically. So if there is a file foo/bar.cljs relative to your current dir, then you can load it via (:require [foo.bar :as fb]). Note that nbb uses the same naming conventions for namespaces and directories as other Clojure tools: foo-bar in the namespace name becomes foo_bar in the directory name.

To load dependencies from the Clojure ecosystem, you can use the Clojure CLI or babashka to download them and produce a classpath:

$ classpath="$(clojure -A:nbb -Spath -Sdeps '{:aliases {:nbb {:replace-deps {com.github.seancorfield/honeysql {:git/tag "v2.0.0-rc5" :git/sha "01c3a55"}}}}}')"

and then feed it to the --classpath argument:

$ nbb --classpath "$classpath" -e "(require '[honey.sql :as sql]) (sql/format {:select :foo :from :bar :where [:= :baz 2]})"
["SELECT foo FROM bar WHERE baz = ?" 2]

Currently nbb only reads from directories, not jar files, so you are encouraged to use git libs. Support for .jar files will be added later.

Current file

The name of the file that is currently being executed is available via nbb.core/*file* or on the metadata of vars:

(ns foo
  (:require [nbb.core :refer [*file*]]))

(prn *file*) ;; "/private/tmp/foo.cljs"

(defn f [])
(prn (:file (meta #'f))) ;; "/private/tmp/foo.cljs"

Reagent

Nbb includes reagent.core which will be lazily loaded when required. You can use this together with ink to create a TUI application:

$ npm install ink

ink-demo.cljs:

(ns ink-demo
  (:require ["ink" :refer [render Text]]
            [reagent.core :as r]))

(defonce state (r/atom 0))

(doseq [n (range 1 11)]
  (js/setTimeout #(swap! state inc) (* n 500)))

(defn hello []
  [:> Text {:color "green"} "Hello, world! " @state])

(render (r/as-element [hello]))

Promesa

Working with callbacks and promises can become tedious. Since nbb v0.0.36 the promesa.core namespace is included with the let and do! macros. An example:

(ns prom
  (:require [promesa.core :as p]))

(defn sleep [ms]
  (js/Promise.
   (fn [resolve _]
     (js/setTimeout resolve ms))))

(defn do-stuff
  []
  (p/do!
   (println "Doing stuff which takes a while")
   (sleep 1000)
   1))

(p/let [a (do-stuff)
        b (inc a)
        c (do-stuff)
        d (+ b c)]
  (prn d))
$ nbb prom.cljs
Doing stuff which takes a while
Doing stuff which takes a while
3

Also see API docs.

Js-interop

Since nbb v0.0.75 applied-science/js-interop is available:

(ns example
  (:require [applied-science.js-interop :as j]))

(def o (j/lit {:a 1 :b 2 :c {:d 1}}))

(prn (j/select-keys o [:a :b])) ;; #js {:a 1, :b 2}
(prn (j/get-in o [:c :d])) ;; 1

Most of this library is supported in nbb, except the following:

  • destructuring using :syms
  • property access using .-x notation. In nbb, you must use keywords.

See the example of what is currently supported.

Examples

See the examples directory for small examples.

Also check out these projects built with nbb:

API

See API documentation.

Migrating to shadow-cljs

See this gist on how to convert an nbb script or project to shadow-cljs.

Build

Prequisites:

  • babashka >= 0.4.0
  • Clojure CLI >= 1.10.3.933
  • Node.js 16.5.0 (lower version may work, but this is the one I used to build)

To build:

  • Clone and cd into this repo
  • bb release

Run bb tasks for more project-related tasks.

Download Details:
Author: borkdude
Download Link: Download The Source Code
Official Website: https://github.com/borkdude/nbb 
License: EPL-1.0

#node #javascript

Hire Dedicated Node.js Developers - Hire Node.js Developers

If you look at the backend technology used by today’s most popular apps there is one thing you would find common among them and that is the use of NodeJS Framework. Yes, the NodeJS framework is that effective and successful.

If you wish to have a strong backend for efficient app performance then have NodeJS at the backend.

WebClues Infotech offers different levels of experienced and expert professionals for your app development needs. So hire a dedicated NodeJS developer from WebClues Infotech with your experience requirement and expertise.

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Aria Barnes

Aria Barnes

1622719015

Why use Node.js for Web Development? Benefits and Examples of Apps

Front-end web development has been overwhelmed by JavaScript highlights for quite a long time. Google, Facebook, Wikipedia, and most of all online pages use JS for customer side activities. As of late, it additionally made a shift to cross-platform mobile development as a main technology in React Native, Nativescript, Apache Cordova, and other crossover devices. 

Throughout the most recent couple of years, Node.js moved to backend development as well. Designers need to utilize a similar tech stack for the whole web project without learning another language for server-side development. Node.js is a device that adjusts JS usefulness and syntax to the backend. 

What is Node.js? 

Node.js isn’t a language, or library, or system. It’s a runtime situation: commonly JavaScript needs a program to work, however Node.js makes appropriate settings for JS to run outside of the program. It’s based on a JavaScript V8 motor that can run in Chrome, different programs, or independently. 

The extent of V8 is to change JS program situated code into machine code — so JS turns into a broadly useful language and can be perceived by servers. This is one of the advantages of utilizing Node.js in web application development: it expands the usefulness of JavaScript, permitting designers to coordinate the language with APIs, different languages, and outside libraries.

What Are the Advantages of Node.js Web Application Development? 

Of late, organizations have been effectively changing from their backend tech stacks to Node.js. LinkedIn picked Node.js over Ruby on Rails since it took care of expanding responsibility better and decreased the quantity of servers by multiple times. PayPal and Netflix did something comparative, just they had a goal to change their design to microservices. We should investigate the motivations to pick Node.JS for web application development and when we are planning to hire node js developers. 

Amazing Tech Stack for Web Development 

The principal thing that makes Node.js a go-to environment for web development is its JavaScript legacy. It’s the most well known language right now with a great many free devices and a functioning local area. Node.js, because of its association with JS, immediately rose in ubiquity — presently it has in excess of 368 million downloads and a great many free tools in the bundle module. 

Alongside prevalence, Node.js additionally acquired the fundamental JS benefits: 

  • quick execution and information preparing; 
  • exceptionally reusable code; 
  • the code is not difficult to learn, compose, read, and keep up; 
  • tremendous asset library, a huge number of free aides, and a functioning local area. 

In addition, it’s a piece of a well known MEAN tech stack (the blend of MongoDB, Express.js, Angular, and Node.js — four tools that handle all vital parts of web application development). 

Designers Can Utilize JavaScript for the Whole Undertaking 

This is perhaps the most clear advantage of Node.js web application development. JavaScript is an unquestionable requirement for web development. Regardless of whether you construct a multi-page or single-page application, you need to know JS well. On the off chance that you are now OK with JavaScript, learning Node.js won’t be an issue. Grammar, fundamental usefulness, primary standards — every one of these things are comparable. 

In the event that you have JS designers in your group, it will be simpler for them to learn JS-based Node than a totally new dialect. What’s more, the front-end and back-end codebase will be basically the same, simple to peruse, and keep up — in light of the fact that they are both JS-based. 

A Quick Environment for Microservice Development 

There’s another motivation behind why Node.js got famous so rapidly. The environment suits well the idea of microservice development (spilling stone monument usefulness into handfuls or many more modest administrations). 

Microservices need to speak with one another rapidly — and Node.js is probably the quickest device in information handling. Among the fundamental Node.js benefits for programming development are its non-obstructing algorithms.

Node.js measures a few demands all at once without trusting that the first will be concluded. Many microservices can send messages to one another, and they will be gotten and addressed all the while. 

Versatile Web Application Development 

Node.js was worked in view of adaptability — its name really says it. The environment permits numerous hubs to run all the while and speak with one another. Here’s the reason Node.js adaptability is better than other web backend development arrangements. 

Node.js has a module that is liable for load adjusting for each running CPU center. This is one of numerous Node.js module benefits: you can run various hubs all at once, and the environment will naturally adjust the responsibility. 

Node.js permits even apportioning: you can part your application into various situations. You show various forms of the application to different clients, in light of their age, interests, area, language, and so on. This builds personalization and diminishes responsibility. Hub accomplishes this with kid measures — tasks that rapidly speak with one another and share a similar root. 

What’s more, Node’s non-hindering solicitation handling framework adds to fast, letting applications measure a great many solicitations. 

Control Stream Highlights

Numerous designers consider nonconcurrent to be one of the two impediments and benefits of Node.js web application development. In Node, at whatever point the capacity is executed, the code consequently sends a callback. As the quantity of capacities develops, so does the number of callbacks — and you end up in a circumstance known as the callback damnation. 

In any case, Node.js offers an exit plan. You can utilize systems that will plan capacities and sort through callbacks. Systems will associate comparable capacities consequently — so you can track down an essential component via search or in an envelope. At that point, there’s no compelling reason to look through callbacks.

 

Final Words

So, these are some of the top benefits of Nodejs in web application development. This is how Nodejs is contributing a lot to the field of web application development. 

I hope now you are totally aware of the whole process of how Nodejs is really important for your web project. If you are looking to hire a node js development company in India then I would suggest that you take a little consultancy too whenever you call. 

Good Luck!

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Node JS Development Company| Node JS Web Developers-SISGAIN

Top organizations and start-ups hire Node.js developers from SISGAIN for their strategic software development projects in Illinois, USA. On the off chance that you are searching for a first rate innovation to assemble a constant Node.js web application development or a module, Node.js applications are the most appropriate alternative to pick. As Leading Node.js development company, we leverage our profound information on its segments and convey solutions that bring noteworthy business results. For more information email us at hello@sisgain.com

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Top 10 NodeJs app Development Companies- ValueCoders

Node.js is a prominent tech trend in the space of web and mobile application development. It has been proven very efficient and useful for a variety of application development. Thus, all business owners are eager to leverage this technology for creating their applications.

Are you striving to develop an application using Node.js? But can’t decide which company to hire for NodeJS app development? Well! Don’t stress over it, as the following list of NodeJS app development companies is going to help you find the best partner.

Let’s take a glance at top NodeJS application development companies to hire developers in 2021 for developing a mind-blowing application solution.

Before enlisting companies, I would like to say that every company has a foundation on which they thrive. Their end goals, qualities, and excellence define their competence. Thus, I prepared this list by considering a number of aspects. While making this list, I have considered the following aspects:

  • Review and rating
  • Enlisted by software peer & forums
  • Hourly price
  • Offered services
  • Year of experience (Average 8+ years)
  • Credibility & Excellence
  • Served clients and more

I believe this list will help you out in choosing the best NodeJS service provider company. So, now let’s explore the top NodeJS developer companies to choose from in 2021.

#1. JSGuru

JSGuru is a top-rated NodeJS app development company with an innovative team of dedicated NodeJS developers engaged in catering best-class UI/UX design, software products, and AWS professional services.

It is a team of one of the most talented developers to hire for all types of innovative solution development, including social media, dating, enterprise, and business-oriented solutions. The company has worked for years with a number of startups and launched a variety of products by collaborating with big-name corporations like T-systems.

If you want to hire NodeJS developers to secure an outstanding application, I would definitely suggest them. They serve in the area of eLearning, FinTech, eCommerce, Telecommunications, Mobile Device Management, and more.

  • Ratings: 4.9/5.0

  • Founded: 2006

  • Headquarters: Banja Luka, Bosnia, and Herzegovina

  • Price: Starting from $50/hour

Visit Website - https://www.valuecoders.com/blog/technology-and-apps/top-node-js-app-development-companies

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