Node JS

This blog is about the Node.js platform, a popular choice for building scalable and reliable web applications. It covers a wide range of topics, including:

• Getting started with Node.js

• Building web applications with Node.js

• Using Node.js for Microservices

• Securing Node.js applications

• Optimizing Node.js performance

• Deploying Node.js applications

Installation

• Go to Node.js (nodejs.org)

• Download the LTS version.

• Accept all terms and install.

Now Check whether the node is installed in your computer or not by typing node--version on the hyper terminal.

Run a JS File by node

• Open the VS Code terminal.

• Type the node--version to get the node version and also check the installation of the node.

• Go to the directory where the JS file is stored using cd "address of js file".

• Now type node yourfilename.js (for eg: node index.js) and hit enter.

React Native Modules

const fs = require("fs")//file system

//For writing some text in a text file named message.txt using fs writefile module
fs.writeFile("message.txt","Hello, World!",(err)=>{
if (err) throw err;
console.log("The file has been saved");
});

//For reading some text from a text file named msg.txt using fs readfile module
fs.readFile("./msg.txt","utf8",(err,data)=>{
if (err) throw err;
console.log(data);
});

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NPM Package Manager

Let we have to generate a random superhero name using the node then the following steps are involved for generating the superhero name

• Open the VS Code terminal.

• Initialise npm using npm init.

• Install npm pacakges using npm i superheroes.

• Open the package.json file and type in the file Type: "module".

• Now open the js file and type the following code.

    import superheroes from "superheroes";
  
    const name = superheroes.random();
  
    console.log(name);