Reid  Rohan

Reid Rohan

1658156064

Leveldown-prebuilt: Pure C++ Node.js LevelDB Binding Serving

UPDATE

leveldown (>= 1.2.2) now supports prebuilds so you shouldn't have to use this fork anymore

This is an experimental fork of leveldown using prebuild binaries to avoid the compile step when installing from npm. To use this fork do

npm install leveldown-prebuilt

Or to install the hyper fork

npm install leveldown-hyper-prebuilt

For a list of supported prebuilt platform binaries check out https://github.com/mafintosh/node-leveldown/releases

LevelDOWN

A Low-level Node.js LevelDB binding

LevelDOWN was extracted from LevelUP and now serves as a stand-alone binding for LevelDB.

It is strongly recommended that you use LevelUP in preference to LevelDOWN unless you have measurable performance reasons to do so. LevelUP is optimised for usability and safety. Although we are working to improve the safety of the LevelDOWN interface it is still easy to crash your Node process if you don't do things in just the right way.

See the section on safety below for details of known unsafe operations with LevelDOWN.

Tested & supported platforms


  • Linux (including ARM platforms such as Raspberry Pi and Kindle!)
  • Mac OS
  • Solaris (SmartOS & Nodejitsu)
  • FreeBSD
  • Windows
    • Node 0.10 and above only, see issue #5 for more info
    • See installation instructions for node-gyp dependencies here, you'll need these (free) components from Microsoft to compile and run any native Node add-on in Windows.

API


leveldown(location)

leveldown() returns a new LevelDOWN instance. location is a String pointing to the LevelDB location to be opened.


leveldown#open([options, ]callback)

open() is an instance method on an existing database object.

The callback function will be called with no arguments when the database has been successfully opened, or with a single error argument if the open operation failed for any reason.

options

The optional options argument may contain:

'createIfMissing' (boolean, default: true): If true, will initialise an empty database at the specified location if one doesn't already exist. If false and a database doesn't exist you will receive an error in your open() callback and your database won't open.

'errorIfExists' (boolean, default: false): If true, you will receive an error in your open() callback if the database exists at the specified location.

'compression' (boolean, default: true): If true, all compressible data will be run through the Snappy compression algorithm before being stored. Snappy is very fast and shouldn't gain much speed by disabling so leave this on unless you have good reason to turn it off.

'cacheSize' (number, default: 8 * 1024 * 1024 = 8MB): The size (in bytes) of the in-memory LRU cache with frequently used uncompressed block contents.

Advanced options

The following options are for advanced performance tuning. Modify them only if you can prove actual benefit for your particular application.

  • 'writeBufferSize' (number, default: 4 * 1024 * 1024 = 4MB): The maximum size (in bytes) of the log (in memory and stored in the .log file on disk). Beyond this size, LevelDB will convert the log data to the first level of sorted table files. From the LevelDB documentation:

Larger values increase performance, especially during bulk loads. Up to two write buffers may be held in memory at the same time, so you may wish to adjust this parameter to control memory usage. Also, a larger write buffer will result in a longer recovery time the next time the database is opened.

'blockSize' (number, default 4096 = 4K): The approximate size of the blocks that make up the table files. The size related to uncompressed data (hence "approximate"). Blocks are indexed in the table file and entry-lookups involve reading an entire block and parsing to discover the required entry.

'maxOpenFiles' (number, default: 1000): The maximum number of files that LevelDB is allowed to have open at a time. If your data store is likely to have a large working set, you may increase this value to prevent file descriptor churn. To calculate the number of files required for your working set, divide your total data by 2MB, as each table file is a maximum of 2MB.

'blockRestartInterval' (number, default: 16): The number of entries before restarting the "delta encoding" of keys within blocks. Each "restart" point stores the full key for the entry, between restarts, the common prefix of the keys for those entries is omitted. Restarts are similar to the concept of keyframs in video encoding and are used to minimise the amount of space required to store keys. This is particularly helpful when using deep namespacing / prefixing in your keys.


leveldown#close(callback)

close() is an instance method on an existing database object. The underlying LevelDB database will be closed and the callback function will be called with no arguments if the operation is successful or with a single error argument if the operation failed for any reason.


leveldown#put(key, value[, options], callback)

put() is an instance method on an existing database object, used to store new entries, or overwrite existing entries in the LevelDB store.

The key and value objects may either be Strings or Node.js Buffer objects. Other object types are converted to JavaScript Strings with the toString() method. Keys may not be null or undefined and objects converted with toString() should not result in an empty-string. Values of null, undefined, '', [] and new Buffer(0) (and any object resulting in a toString() of one of these) will be stored as a zero-length character array and will therefore be retrieved as either '' or new Buffer(0) depending on the type requested.

A richer set of data-types are catered for in LevelUP.

options

The only property currently available on the options object is 'sync' (boolean, default: false). If you provide a 'sync' value of true in your options object, LevelDB will perform a synchronous write of the data; although the operation will be asynchronous as far as Node is concerned. Normally, LevelDB passes the data to the operating system for writing and returns immediately, however a synchronous write will use fsync() or equivalent so your callback won't be triggered until the data is actually on disk. Synchronous filesystem writes are significantly slower than asynchronous writes but if you want to be absolutely sure that the data is flushed then you can use 'sync': true.

The callback function will be called with no arguments if the operation is successful or with a single error argument if the operation failed for any reason.


leveldown#get(key[, options], callback)

get() is an instance method on an existing database object, used to fetch individual entries from the LevelDB store.

The key object may either be a String or a Node.js Buffer object and cannot be undefined or null. Other object types are converted to JavaScript Strings with the toString() method and the resulting String may not be a zero-length. A richer set of data-types are catered for in LevelUP.

Values fetched via get() that are stored as zero-length character arrays (null, undefined, '', [], new Buffer(0)) will return as empty-String ('') or new Buffer(0) when fetched with asBuffer: true (see below).

options

The optional options object may contain:

'fillCache' (boolean, default: true): LevelDB will by default fill the in-memory LRU Cache with data from a call to get. Disabling this is done by setting fillCache to false.

'asBuffer' (boolean, default: true): Used to determine whether to return the value of the entry as a String or a Node.js Buffer object. Note that converting from a Buffer to a String incurs a cost so if you need a String (and the value can legitimately become a UFT8 string) then you should fetch it as one with asBuffer: true and you'll avoid this conversion cost.

The callback function will be called with a single error if the operation failed for any reason. If successful the first argument will be null and the second argument will be the value as a String or Buffer depending on the asBuffer option.


leveldown#del(key[, options], callback)

del() is an instance method on an existing database object, used to delete entries from the LevelDB store.

The key object may either be a String or a Node.js Buffer object and cannot be undefined or null. Other object types are converted to JavaScript Strings with the toString() method and the resulting String may not be a zero-length. A richer set of data-types are catered for in LevelUP.

options

The only property currently available on the options object is 'sync' (boolean, default: false). See leveldown#put() for details about this option.

The callback function will be called with no arguments if the operation is successful or with a single error argument if the operation failed for any reason.


leveldown#batch(operations[, options], callback)

batch() is an instance method on an existing database object. Used for very fast bulk-write operations (both put and delete). The operations argument should be an Array containing a list of operations to be executed sequentially, although as a whole they are performed as an atomic operation inside LevelDB. Each operation is contained in an object having the following properties: type, key, value, where the type is either 'put' or 'del'. In the case of 'del' the 'value' property is ignored. Any entries with a 'key' of null or undefined will cause an error to be returned on the callback. Any entries where the type is 'put' that have a 'value' of undefined, null, [], '' or new Buffer(0) will be stored as a zero-length character array and therefore be fetched during reads as either '' or new Buffer(0) depending on how they are requested.

See LevelUP for full documentation on how this works in practice.

options

The only property currently available on the options object is 'sync' (boolean, default: false). See leveldown#put() for details about this option.

The callback function will be called with no arguments if the operation is successful or with a single error argument if the operation failed for any reason.


leveldown#approximateSize(start, end, callback)

approximateSize() is an instance method on an existing database object. Used to get the approximate number of bytes of file system space used by the range [start..end). The result may not include recently written data.

The start and end parameters may be either String or Node.js Buffer objects representing keys in the LevelDB store.

The callback function will be called with no arguments if the operation is successful or with a single error argument if the operation failed for any reason.


leveldown#getProperty(property)

getProperty can be used to get internal details from LevelDB. When issued with a valid property string, a readable string will be returned (this method is synchronous).

Currently, the only valid properties are:

'leveldb.num-files-at-levelN': return the number of files at level N, where N is an integer representing a valid level (e.g. "0").

'leveldb.stats': returns a multi-line string describing statistics about LevelDB's internal operation.

'leveldb.sstables': returns a multi-line string describing all of the sstables that make up contents of the current database.


leveldown#iterator([options])

iterator() is an instance method on an existing database object. It returns a new Iterator instance.

options

The optional options object may contain:

'gt' (greater than), 'gte' (greater than or equal) define the lower bound of the values to be fetched and will determine the starting point where 'reverse' is not true. Only records where the key is greater than (or equal to) this option will be included in the range. When 'reverse' is 'true` the order will be reversed, but the records returned will be the same.

'lt' (less than), 'lte' (less than or equal) define the higher bound of the range to be fetched and will determine the starting poitn where 'reverse' is not true. Only key / value pairs where the key is less than (or equal to) this option will be included in the range. When 'reverse' is true the order will be reversed, but the records returned will be the same.

'start', 'end' legacy ranges - instead use 'gte', 'lte'

'reverse' (boolean, default: false): a boolean, set to true if you want the stream to go in reverse order. Beware that due to the way LevelDB works, a reverse seek will be slower than a forward seek.

'keys' (boolean, default: true): whether the callback to the next() method should receive a non-null key. There is a small efficiency gain if you ultimately don't care what the keys are as they don't need to be converted and copied into JavaScript.

'values' (boolean, default: true): whether the callback to the next() method should receive a non-null value. There is a small efficiency gain if you ultimately don't care what the values are as they don't need to be converted and copied into JavaScript.

'limit' (number, default: -1): limit the number of results collected by this iterator. This number represents a maximum number of results and may not be reached if you get to the end of the store or your 'end' value first. A value of -1 means there is no limit.

'fillCache' (boolean, default: false): wheather LevelDB's LRU-cache should be filled with data read.

'keyAsBuffer' (boolean, default: true): Used to determine whether to return the key of each entry as a String or a Node.js Buffer object. Note that converting from a Buffer to a String incurs a cost so if you need a String (and the value can legitimately become a UFT8 string) then you should fetch it as one.

'valueAsBuffer' (boolean, default: true): Used to determine whether to return the value of each entry as a String or a Node.js Buffer object.


iterator#next(callback)

next() is an instance method on an existing iterator object, used to increment the underlying LevelDB iterator and return the entry at that location.

the callback function will be called with no arguments in any of the following situations:

  • the iterator comes to the end of the store
  • the end key has been reached; or
  • the limit has been reached

Otherwise, the callback function will be called with the following 3 arguments:

  • error - any error that occurs while incrementing the iterator.
  • key - either a String or a Node.js Buffer object depending on the keyAsBuffer argument when the iterator() was called.
  • value - either a String or a Node.js Buffer object depending on the valueAsBuffer argument when the iterator() was called.

iterator#end(callback)

end() is an instance method on an existing iterator object. The underlying LevelDB iterator will be deleted and the callback function will be called with no arguments if the operation is successful or with a single error argument if the operation failed for any reason.


leveldown.destroy(location, callback)

destroy() is used to completely remove an existing LevelDB database directory. You can use this function in place of a full directory rm if you want to be sure to only remove LevelDB-related files. If the directory only contains LevelDB files, the directory itself will be removed as well. If there are additional, non-LevelDB files in the directory, those files, and the directory, will be left alone.

The callback will be called when the destroy operation is complete, with a possible error argument.

leveldown.repair(location, callback)

repair() can be used to attempt a restoration of a damaged LevelDB store. From the LevelDB documentation:

If a DB cannot be opened, you may attempt to call this method to resurrect as much of the contents of the database as possible. Some data may be lost, so be careful when calling this function on a database that contains important information.

You will find information on the repair operation in the LOG file inside the store directory.

A repair() can also be used to perform a compaction of the LevelDB log into table files.

The callback will be called when the repair operation is complete, with a possible error argument.

Safety


Database state

Currently LevelDOWN does not track the state of the underlying LevelDB instance. This means that calling open() on an already open database may result in an error. Likewise, calling any other operation on a non-open database may result in an error.

LevelUP currently tracks and manages state and will prevent out-of-state operations from being send to LevelDOWN. If you use LevelDOWN directly then you must track and manage state for yourself.

Snapshots


LevelDOWN exposes a feature of LevelDB called snapshots. This means that when you do e.g. createReadStream and createWriteStream at the same time, any data modified by the write stream will not affect data emitted from the read stream. In other words, a LevelDB Snapshot captures the latest state at the time the snapshot was created, enabling the snapshot to iterate or read the data without seeing any subsequent writes. Any read not performed on a snapshot will implicitly use the latest state.

Getting support


There are multiple ways you can find help in using LevelDB in Node.js:

  • IRC: you'll find an active group of LevelUP users in the ##leveldb channel on Freenode, including most of the contributors to this project.
  • Mailing list: there is an active Node.js LevelDB Google Group.
  • GitHub: you're welcome to open an issue here on this GitHub repository if you have a question.

Contributing


LevelDOWN is an OPEN Open Source Project. This means that:

Individuals making significant and valuable contributions are given commit-access to the project to contribute as they see fit. This project is more like an open wiki than a standard guarded open source project.

See the CONTRIBUTING.md file for more details.

Contributors

LevelDOWN is only possible due to the excellent work of the following contributors:

Rod VaggGitHub/rvaggTwitter/@rvagg
John ChesleyGitHub/cheslesTwitter/@chesles
Jake VerbatenGitHub/raynosTwitter/@raynos2
Dominic TarrGitHub/dominictarrTwitter/@dominictarr
Max OgdenGitHub/maxogdenTwitter/@maxogden
Lars-Magnus SkogGitHub/ralphtheninjaTwitter/@ralphtheninja
David BjörklundGitHub/keslaTwitter/@david_bjorklund
Julian GruberGitHub/juliangruberTwitter/@juliangruber
Paolo FragomeniGitHub/hij1nxTwitter/@hij1nx
Anton WhalleyGitHub/No9Twitter/@antonwhalley
Matteo CollinaGitHub/mcollinaTwitter/@matteocollina
Pedro TeixeiraGitHub/pgteTwitter/@pgte
James HallidayGitHub/substackTwitter/@substack

Windows

A large portion of the Windows support comes from code by Krzysztof Kowalczyk @kjk, see his Windows LevelDB port here. If you're using LevelUP on Windows, you should give him your thanks!


Author: mafintosh
Source Code: https://github.com/mafintosh/leveldown-prebuilt 
License: MIT license

#javascript #cpluplus #node #leveldb 

What is GEEK

Buddha Community

Leveldown-prebuilt: Pure C++ Node.js LevelDB Binding Serving

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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