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Introduction Short for request, the req object is one half of the request and response cycle to examine calls from the client side, make HTTP requests, and handle incoming data whether in a string or JSON object. In this article, you will learn about the req object in Express. Prerequisites To follow along with this article, you will need: A general understanding of Node.js is suggested, but not..

It will lists all the files that will be included in the package IF we were to update it. The “--dry-run” flag doesn’t actually publish anything. It lists all the files that would be published. npm publish --dry-run

Right now AWS Lambda supports Node 16. Before last month, Node 14 was the only one that AWS Lambda supports. - Don't use an odd version of Node. - Use even version only. Timers now work - Timer is now promises Node.js 16 available now This blog was written by Bethany Griggs, with additional contributions from the Node.js Technical Steering Committee. We are excited to announce the release of Nod..

const fs = require('fs'); //createReadStream: read the file //first argument: location of the file //second argument: option argument //encoding: 'utf8' : enabled the readable format const readStream = fs.createReadStream('./docs/blog3.txt', {encoding: 'utf8'}); //createWriteStream: write to the file const writeStream = fs.createWriteStream('./docs/blog4.txt'); //on: file readevent listener //ev..

const fs = require('fs'); //asynchronous functions //read files //first argument: location of the file //function fs.readFile('./docs/blog1.txt', (err,data) => { if (err) { console.log(err); } console.log(data.toString()); }); // write files // first argument: location and name of the file // second argument: content // third argument: callback function (after finishing writing) fs.writeFile('./..

/routes/blogRoutes.js const express = require('express'); const router = express.Router(); router.get('/blogs', (req, res) =>{ //do something }); module.exports = router; /app.js const blogRoutes = require('./routes/blogRoutes'); app.use(blogRoutes) //all of the blogRoutes handles will be used there. The order of middleware is important. app.use("/blog", blogRoutes) //this will help to remove so..

What exactly are streams? Streams are collections of data — just like arrays or strings. The difference is that streams might not be available all at once, and they don’t have to fit in memory. This makes streams really powerful when working with large amounts of data, or data that’s coming from an external source one chunk at a time. However, streams are not only about working with big data. Th..

The Child Processes Module We can easily spin a child process using Node’s child_process module and those child processes can easily communicate with each other with a messaging system. The child_process module enables us to access Operating System functionalities by running any system command inside a, well, child process. We can control that child process input stream, and listen to its output..

Setting Up An Express Server To get started working with a Node.js project you will need to run npm init -y. This will create a basic package.json file with all of the default values filled in for you. From there the next thing to do is install Express by running npm i express. Lastly, we need to create a server.js file with the following code. const express = require('express') const app = expr..

You could use jest.mock(moduleName, factory, options) to mock aws-sdk module manually. E.g. handler.js: const aws = require('aws-sdk'); const dynamoDb = new aws.DynamoDB.DocumentClient(); const promisify = (foo) => new Promise((resolve, reject) => { foo((error, result) => { if (error) { reject(error); } else { resolve(result); } }); }); const getUser = (userId) => promisify((callback) => dynamoD..