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坂本 篤司

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ReactとNode.js APIを介してスマートコントラクトと対話する

DAppを構築する場合、ユーザーがスマートコントラクトを操作するために、ユーザーとユーザーの両方に、サードパーティのブラウザー固有のプラグインまたは拡張機能が必要になります。これを書いている時点では、ブロックチェーンノード上のスマートコントラクトと対話する機能が組み込まれている主要なブラウザーはありません。

ユーザーが必要な拡張機能をインストールするのではなく、DAppを使用してスマートコントラクトとすぐにやり取りできるとしたらどうでしょうか。この記事では、Web3.jsを使用してブロックチェーンネットワークとやり取りしてデータを取得し、Reactを使用してブラウザーアプリのユーザーにデータを送り返すNode.jsAPIを構築します。

この記事を続けるために、このGitHubリポジトリで完全なコードにアクセスできます。しかし、プロジェクトに取り掛かる前に、ブロックチェーンテクノロジーのいくつかの基礎について考えてみましょう。

ブロックチェーン技術の基礎

ブロックチェーンテクノロジーは、分散型システムに基づいています。分散型システムを理解するには、まず集中型システムを理解する必要があります。Facebook、Google、Twitter、Instagram、WhatsAppなどのオンラインサービスの大部分はすべて集中型システムを使用しています。つまり、ユーザーデータはサーバーに保存され、組織は集中型サーバーまたはデータベースに完全にアクセスできます。

分散型システムでは、ユーザーデータはブロックチェーンネットワーク内の複数のノードに分散され、すべてのノードにそのデータの完全なコピーが含まれます。これらのノードは単一のエンティティによって所有されているのではなく、世界中の個人によって所有されています

ブロックチェーンを理解するには、ブロック、マイナー、ノードの3つの重要な概念を理解する必要があります。

ブロックチェーンネットワークはチェーンで構成され、すべてのチェーンはブロックで構成されます。ブロックには3つの要素があります。ブロック内のデータ(32ビットの整数であるナンス)とハッシュ(256ビットの数値)です。

マイニングのプロセスを使用して、マイナーはチェーン内に新しいブロックを作成します。すべてのブロックにはチェーン内の前のブロックのハッシュへの参照があるため、ブロックのマイニングは非常に難しいプロセスです。

ノードとは、ブロックチェーン内のコンピューターまたはその他の電子デバイスを指します。分散化は、ブロックチェーンテクノロジーの中核です。1台のコンピューターまたは組織がチェーンを所有することはできません。代わりに、チェーンに接続されたノードを介して配布されます。

入門

プロジェクトを開始するには、GanacheとTruffleを設定する必要があります。これにより、スマートコントラクトを操作できるようになります。

ツールの設定

まず、公式WebサイトからTruffleをダウンロードしてから、以下のコマンドを使用してインストールします。

npm i truffle -g

Ganacheをインストールするには、公式ドキュメントに従ってください。開くと、次のような画面が表示されます。

メタマスクの設定

先に進み、Metamask拡張機能をGoogleChromeに追加します。メタマスクがChromeブラウザに追加されたら、拡張機能アイコンをクリックすると、次のような画面が表示されます。Metamaskを初めて開く場合は、リストにネットワークが表示されない可能性があることに注意してください。

次に、プライベートネットワークをクリックします。以下の画面が表示されます。この画面には、さまざまなネットワークがすべて一覧表示されています。

[ネットワークの追加]をクリックすると、下の画像のような別のページにリダイレクトされます。

フォームに次の詳細を記入します。

チェーンIDのエラーは無視してください。Metamaskはそれをそのまま受け入れます。これで、[保存]をクリックできます。ChromeでMetamask拡張機能をクリックすると、新しく作成したネットワークが次のようにリストに表示されます。

バックエンドの設定

バックエンドの構築を開始するには、まず、マシンにpnpmがグローバルにインストールされていることを確認します。npmやYarnの代わりにpnpmを使用します。pnpmをまだインストールしていない場合は、以下のコマンドを実行してインストールします。

npm install pnpm -g

次に、nodemonがグローバルにインストールされていることを確認します。そうでない場合は、以下のコマンドを実行してインストールします。

npm install nodemon -g

Ganacheを起動し、ターミナルを開いて、以下のコマンドに従います。

mkdir blockchain-node
cd blockchain-node
mkdir blockchain-node-api
cd blockchain-node-api
pnpm init -y

お気に入りのコードエディタでプロジェクトを開き、package.jsonファイルを開いてから、そのファイルに次のコードを追加します。

{
  "name": "blockchain-node-api",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "start": "nodemon server.js",
    "build": "node server.js"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "@truffle/contract": "^4.4.1",
    "cors": "^2.8.5",
    "express": "^4.17.2",
    "mongodb": "^4.2.2",
    "nodemon": "^2.0.15",
    "web3": "^1.6.1"
  }
}

上記のすべての依存関係をインストールするには、次のコマンドを実行します。

pnpm install

最初のスマートコントラクトを書く

プロジェクトをTruffleプロジェクトとして初期化するには、以下のコマンドを実行しますblockchain-node-api

truffle init

上記のコマンドは、いくつかのフォルダーを生成します。フォルダ内contractsに、という新しいファイルを作成し、その中Contacts.solのコードの下にコードを貼り付けます。

pragma solidity ^0.8.10;

contract Contacts {
  uint public count = 0; // state variable

  struct Contact {
    uint id;
    string name;
    string phone;
  }

  constructor() public {
    createContact('Zafar Saleem', '123123123');
  }

  mapping(uint => Contact) public contacts;

  function createContact(string memory _name, string memory _phone) public {
    count++;
    contacts[count] = Contact(count, _name, _phone);
  }
}

これで、Solidityを使用する最初のスマートコントラクトができました。contractキーワードを使用してスマートコントラクトを作成し、名前を付けましたContacts。の中Contactsに、と呼ばれる状態パブリック変数を作成しますcount

次に、structキーワードを使用して構造を作成し、名前を付けましたContactid、、namephoneプロパティとして追加しました。その後、コンストラクター関数を作成しました。createContactその関数内で、このコントラクトクラスの最後に宣言されている関数を呼び出すことにより、コントラクトに1つの連絡先を追加しました。

map契約に連絡先を追加するために作成しました。パラメータとして宣言しcreateContactて渡しました。これはパブリック関数であることに注意してください。次に、で使用する状態変数を更新します。namephonecountidcontacts map

これで、最初のスマートコントラクトの作成が完了しました。次に、スマートコントラクトをTruffleにデプロイします。migrationsその名前でフォルダに新しいファイルを作成し、2_deploy_contacts.js以下のコードを貼り付けます。

const Contacts = artifacts.require("./Contacts.sol");

module.exports = function(deployer) {
  deployer.deploy(Contacts);
};

次に、ファイルを開き、truffle-config.js以下のコードをファイルに貼り付けます。

module.exports = {
  networks: {
    development: {
      host: "127.0.0.1",
      port: 7545,
      network_id: "*"
    }
  },
  compilers: {
    solc: {
      version: "0.8.10",
      optimizer: {
        enabled: true,
        runs: 200
      }
    }
  }
}

上記のすべての情報がGanacheネットワーク設定と一致していることを確認してください。特にhostport。次に、次のコマンドを実行します。

truffle migrate

コマンドがスマートコントラクトを移行するのに数秒かかる場合があります。

Node.jsAPIを作成します

スマートコントラクトを作成してTruffleにデプロイすると、フロントエンドアプリケーションとスマートコントラクトの間のレイヤーとして機能するAPIを作成できます。フォルダ内に、、、およびとblockchain-node-api呼ばれるファイルを作成します。次に、ファイルを開き、以下のコードを貼り付けます。routes.jsserver.jsconfig.jsserver.js

const express = require('express');
const app = express();
const cors = require('cors');
const routes = require('./routes');
const Web3 = require('web3');
const mongodb = require('mongodb').MongoClient;
const contract = require('@truffle/contract');
const artifacts = require('./build/contracts/Contacts.json');
const CONTACT_ABI = require('./config');
const CONTACT_ADDRESS = require('./config');

app.use(cors());
app.use(express.json());

if (typeof web3 !== 'undefined') {
        var web3 = new Web3(web3.currentProvider); 
} else {
        var web3 = new Web3(new Web3.providers.HttpProvider('http://localhost:7545'));
}

mongodb.connect('mongodb://127.0.0.1:27017/blockchain-node-api',
        {
                useUnifiedTopology: true,
        }, async (err, client) => {
        const db =client.db('Cluster0');
        const accounts = await web3.eth.getAccounts();
        const contactList = new web3.eth.Contract(CONTACT_ABI.CONTACT_ABI, CONTACT_ADDRESS.CONTACT_ADDRESS);

        routes(app, db, accounts, contactList);
        app.listen(process.env.PORT || 3001, () => {
                console.log('listening on port '+ (process.env.PORT || 3001));
        });
});

server.jsNode.jsサーバーとして実行されるメインファイルです。ファイルの先頭にすべての依存関係が必要です。次に、corsとExpressを使用して、Web3.jsをチェックし、localhostアドレスを指定してブロックチェーンネットワークと相互作用させます。

次に、MongoDBデータベースに接続しています。この記事ではデータベースを使用していませんが、将来使用できるように準備しておくとよいでしょう。関数のコールバック関数内で、Ethereumブロックチェーンネットワークにmongodb.connect()接続しCluster0て取得しています。accounts

web3 Contract渡す関数とCONTACT_ABIを使用しCONTACT_ADDRESSて、スマートコントラクトに接続します。この情報を、config.js前に作成したファイルに追加します。

次に、routes()すべてのパラメーターを使用して呼び出します。このroutes関数は、前に作成したroutes.jsファイルに作成します。あなたはでアプリを聞くことができますport 3001config.jsファイルに移動して開き、以下のコードを追加しましょう。

const CONTACT_ADDRESS = '0xB7fC6C3DFebD24EAe16E307Ea39EdF7c93ff7866';

const CONTACT_ABI = [
        {
    "inputs": [],
    "stateMutability": "nonpayable",
    "type": "constructor"
  },
  {
    "inputs": [
      {
        "internalType": "uint256",
        "name": "",
        "type": "uint256"
      }
    ],
    "name": "contacts",
    "outputs": [
      {
        "internalType": "uint256",
        "name": "id",
        "type": "uint256"
      },
      {
        "internalType": "string",
        "name": "name",
        "type": "string"
      },
      {
        "internalType": "string",
        "name": "phone",
        "type": "string"
      }
    ],
    "stateMutability": "view",
    "type": "function",
    "constant": true
  },
  {
    "inputs": [],
    "name": "count",
    "outputs": [
      {
        "internalType": "uint256",
        "name": "",
        "type": "uint256"
      }
    ],
    "stateMutability": "view",
    "type": "function",
    "constant": true
  },
  {
    "inputs": [
      {
        "internalType": "string",
        "name": "_name",
        "type": "string"
      },
      {
        "internalType": "string",
        "name": "_phone",
        "type": "string"
      }
    ],
    "name": "createContact",
    "outputs": [],
    "stateMutability": "nonpayable",
    "type": "function"
  }
];

module.exports = {
        CONTACT_ABI,
        CONTACT_ADDRESS,
};

server.js以前に行ったように、ファイル内のWeb3.jsを使用してスマートコントラクトに接続するには、この情報が必要になります。次に、次のコードをroutes.jsファイルに追加します。

function routes(app, db, accounts, contactList) {
        app.get('/contacts', async (request, response) => {
                let cache = [];
                const COUNTER = await contactList.methods.count().call();

                for (let i = 1; i <= COUNTER; i++) {
      const contact = await contactList.methods.contacts(i).call();
      cache = [...cache, contact];
    }

    response.json(cache);
  });
}

module.exports = routes

このファイルではroutes、必要なすべてのパラメーターを使用して関数を作成しています。次に、エンドポイントのGETルートを使用しています。/contactsコールバック関数内で、キャッシュ変数を作成しています。次にCOUNTER、関数を呼び出すことでスマートコントラクトからを取得しcount()ます。この関数は、の名前でパブリック状態変数を作成すると自動的に作成されますcount

次に、すべてをループして、から1つずつCOUNTER取得します。これを変数に配置し、最後に応答として前面に送信します。contactscontactListcache

ファイルの最後で、関数をエクスポートして、この場合routesのような他の関数で使用できるようにします。server.js

次に、次のコマンドを使用してサーバーを実行します。

nodemon server.js

上記のコマンドはサーバーを実行します。サーバーはReactアプリからのリクエストを受信する準備ができています。

Reactでフロントエンドを構築する

スマートコントラクト、Node.jsサーバー、APIの準備ができたので、フロントエンドReactアプリを作成できます。CDフォルダに移動しblockchain-node、以下のコマンドを実行してReactプロジェクトを作成します。

pnpx create-react-app blockchain-node-api-react

新しいプロジェクトが読み込まれたら、App.jsファイルを開き、既存のコードを次のコードに置き換えます。

import { useEffect, useState } from 'react';
import logo from './logo.svg';
import './App.css';

function App() {
        const [contacts, setContacts] = useState([]);

        useEffect(() => {
                async function fetcher() {
                        const response = await fetch('http://localhost:3001/contacts');        
                        const contacts = await response.json();

                        setContacts(contacts);
                }

                fetcher();
        }, []);

  return (
    <div>
            <ul>
      {
              contacts.map(contact => (
                      <li key={contact.id}>
                              <p>Name: {contact.name}</p>
                              <span>Phone: {contact.phone}</span>
                      </li>
              ))
      }
      </ul>
    </div>
  );
}

export default App;

上記のコードは、ローカル状態変数を宣言している単純なReact機能コンポーネントを生成しますcontacts

フック内で、useEffect作成したNode.jsサーバーにリクエストを送信します。サーバーはWeb3.jsを使用してブロックチェーンネットワークからすべての連絡先を取得し、連絡先をReactアプリに送信します。サーバーからのこれらの連絡先を変数に入れcontacts、ローカル状態変数に設定しますcontacts。内部jsxでは、すべての連絡先をループして画面にレンダリングします。

以下のコマンドを使用してReactアプリを実行します。

yarn start

上記のコマンドでブラウザが開き、次のような出力が表示されます。

結論

この記事では、サードパーティの拡張機能をインストールせずにユーザーがスマートコントラクトを操作できるようにするNode.jsAPIを作成しました。ブロックチェーンテクノロジーを理解し、Node.jsを使用してバックエンドを構築し、スマートコントラクトを作成し、最後にReactを使用してフロントエンドを構築するためのいくつかの基礎について説明しました。

このチュートリアルを楽しんでいただければ幸いです。ご不明な点がございましたら、必ずコメントを残してください。また、私の略歴にリンクされているソーシャルメディアアカウントで私をフォローして接続することを忘れないでください。

ソース:https ://blog.logrocket.com/interacting-smart-contracts-via-nodejs-api/

 #nodejs #smartcontract #api 

What is GEEK

Buddha Community

ReactとNode.js APIを介してスマートコントラクトと対話する

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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Aria Barnes

Aria Barnes

1625232484

Why is Vue JS the most Preferred Choice for Responsive Web Application Development?

For more than two decades, JavaScript has facilitated businesses to develop responsive web applications for their customers. Used both client and server-side, JavaScript enables you to bring dynamics to pages through expanded functionality and real-time modifications.

Did you know!

According to a web development survey 2020, JavaScript is the most used language for the 8th year, with 67.7% of people choosing it. With this came up several javascript frameworks for frontend, backend development, or even testing.

And one such framework is Vue.Js. It is used to build simple projects and can also be advanced to create sophisticated apps using state-of-the-art tools. Beyond that, some other solid reasons give Vuejs a thumbs up for responsive web application development.

Want to know them? Then follow this blog until the end. Through this article, I will describe all the reasons and benefits of Vue js development. So, stay tuned.

Vue.Js - A Brief Introduction

Released in the year 2014 for public use, Vue.Js is an open-source JavaScript framework used to create UIs and single-page applications. It has over 77.4 million likes on Github for creating intuitive web interfaces.

The recent version is Vue.js 2.6, and is the second most preferred framework according to Stack Overflow Developer Survey 2019.

Every Vue.js development company is widely using the framework across the world for responsive web application development. It is centered around the view layer, provides a lot of functionality for the view layer, and builds single-page web applications.

Some most astonishing stats about Vue.Js:

• Vue was ranked #2 in the Front End JavaScript Framework rankings in the State of JS 2019 survey by developers.

• Approximately 427k to 693k sites are built with Vue js, according to Wappalyzer and BuiltWith statistics of June 2020.

• According to the State of JS 2019 survey, 40.5% of JavaScript developers are currently using Vue, while 34.5% have shown keen interest in using it in the future.

• In Stack Overflow's Developer Survey 2020, Vue was ranked the 3rd most popular front-end JavaScript framework.

Why is Vue.Js so popular?

• High-speed run-time performance
• Vue.Js uses a virtual DOM.
• The main focus is on the core library, while the collaborating libraries handle other features such as global state management and routing.
• Vue.JS provides responsive visual components.

Top 7 Reasons to Choose Vue JS for Web Application Development

Vue js development has certain benefits, which will encourage you to use it in your projects. For example, Vue.js is similar to Angular and React in many aspects, and it continues to enjoy increasing popularity compared to other frameworks.

The framework is only 20 kilobytes in size, making it easy for you to download files instantly. Vue.js easily beats other frameworks when it comes to loading times and usage.

Take a look at the compelling advantages of using Vue.Js for web app development.

#1 Simple Integration

Vue.Js is popular because it allows you to integrate Vue.js into other frameworks such as React, enabling you to customize the project as per your needs and requirements.

It helps you build apps with Vue.js from scratch and introduce Vue.js elements into their existing apps. Due to its ease of integration, Vue.js is becoming a popular choice for web development as it can be used with various existing web applications.

You can feel free to include Vue.js CDN and start using it. Most third-party Vue components and libraries are additionally accessible and supported with the Vue.js CDN.

You don't need to set up node and npm to start using Vue.js. This implies that it helps develop new web applications, just like modifying previous applications.

The diversity of components allows you to create different types of web applications and replace existing frameworks. In addition, you can also choose to hire Vue js developers to use the technology to experiment with many other JavaScript applications.

#2 Easy to Understand

One of the main reasons for the growing popularity of Vue.Js is that the framework is straightforward to understand for individuals. This means that you can easily add Vue.Js to your web projects.

Also, Vue.Js has a well-defined architecture for storing your data with life-cycle and custom methods. Vue.Js also provides additional features such as watchers, directives, and computed properties, making it extremely easy to build modern apps and web applications with ease.

Another significant advantage of using the Vue.Js framework is that it makes it easy to build small and large-scale web applications in the shortest amount of time.

#3 Well-defined Ecosystem

The VueJS ecosystem is vibrant and well-defined, allowing Vue.Js development company to switch users to VueJS over other frameworks for web app development.

Without spending hours, you can easily find solutions to your problems. Furthermore, VueJs lets you choose only the building blocks you need.

Although the main focus of Vue is the view layer, with the help of Vue Router, Vue Test Utils, Vuex, and Vue CLI, you can find solutions and recommendations for frequently occurring problems.

The problems fall into these categories, and hence it becomes easy for programmers to get started with coding right away and not waste time figuring out how to use these tools.

The Vue ecosystem is easy to customize and scales between a library and a framework. Compared to other frameworks, its development speed is excellent, and it can also integrate different projects. This is the reason why most website development companies also prefer the Vue.Js ecosystem over others.

#4 Flexibility

Another benefit of going with Vue.Js for web app development needs is flexibility. Vue.Js provides an excellent level of flexibility. And makes it easier for web app development companies to write their templates in HTML, JavaScript, or pure JavaScript using virtual nodes.

Another significant benefit of using Vue.Js is that it makes it easier for developers to work with tools like templating engines, CSS preprocessors, and type checking tools like TypeScript.

#5 Two-Way Communication

Vue.Js is an excellent option for you because it encourages two-way communication. This has become possible with the MVVM architecture to handle HTML blocks. In this way, Vue.Js is very similar to Angular.Js, making it easier to handle HTML blocks as well.

With Vue.Js, two-way data binding is straightforward. This means that any changes made by the developer to the UI are passed to the data, and the changes made to the data are reflected in the UI.

This is also one reason why Vue.Js is also known as reactive because it can react to changes made to the data. This sets it apart from other libraries such as React.Js, which are designed to support only one-way communication.

#6 Detailed Documentation

One essential thing is well-defined documentation that helps you understand the required mechanism and build your application with ease. It shows all the options offered by the framework and related best practice examples.

Vue has excellent docs, and its API references are one of the best in the industry. They are well written, clear, and accessible in dealing with everything you need to know to build a Vue application.

Besides, the documentation at Vue.js is constantly improved and updated. It also includes a simple introductory guide and an excellent overview of the API. Perhaps, this is one of the most detailed documentation available for this type of language.

#7 Large Community Support

Support for the platform is impressive. In 2018, support continued to impress as every question was answered diligently. Over 6,200 problems were solved with an average resolution time of just six hours.

To support the community, there are frequent release cycles of updated information. Furthermore, the community continues to grow and develop with backend support from developers.



Wrapping Up

VueJS is an incredible choice for responsive web app development. Since it is lightweight and user-friendly, it builds a fast and integrated web application. The capabilities and potential of VueJS for web app development are extensive.

While Vuejs is simple to get started with, using it to build scalable web apps requires professionalism. Hence, you can approach a top Vue js development company in India to develop high-performing web apps.

Equipped with all the above features, it doesn't matter whether you want to build a small concept app or a full-fledged web app; Vue.Js is the most performant you can rely on.

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sophia tondon

sophia tondon

1621250665

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