Choosing Between LocalStorage and SessionStorage in JavaScript

Understanding Sets, Maps, and Objects in JavaScript: When and How to Use Each Learn the differences between JavaScript's Set, Map, and plain Object data structures, their performance characteristics, and real‑world use cases. This tutorial walks you through practical examples, best practices, and guidelines for choosing the right structure for your code. Read the full article 👇 https://lnkd.in/gpUYsFux #JavaScript #WebDevelopment #Programming #Tech #Coding #JavaScriptSet #JavaScriptMap #DataStructures #FrontendDevelopment #JSBestPractices #DigitalTransformation #FutureOfWork

𝗤𝘂𝗶𝗰𝗸 𝘁𝗶𝗽: 𝗡𝗲𝘃𝗲𝗿 𝗿𝗲𝘁𝘂𝗿𝗻 𝗻𝘂𝗹𝗹. 𝗥𝗲𝘁𝘂𝗿𝗻 𝗲𝗺𝗽𝘁𝘆 𝗮𝗿𝗿𝗮𝘆𝘀. ✅ Stop returning null when a list has no results. Return an empty array instead. 𝗕𝗮𝗱: function getUsers() {  return users.length > 0 ? users : null; } 𝗚𝗼𝗼𝗱: function getUsers() {  return users || []; } 𝗪𝗵𝘆 𝗶𝘁 𝗺𝗮𝘁𝘁𝗲𝗿𝘀: ❌ Null forces every caller to check before iterating   ❌ Leads to "Cannot read property of null" crashes   ❌ Creates defensive code everywhere   ❌ Makes chaining operations impossible ✅ Empty arrays can be iterated safely (zero loops, no crash)   ✅ Works with map, filter, reduce without checks   ✅ Cleaner code throughout your application Same applies to objects: return {} instead of null when appropriate. Let your data structures be forgiving. Your team will thank you. 🙏 . . . #JavaScript #BestPractices #CleanCode #WebDevelopment #Programming

🧠 JavaScript Module Question for Developers While building my own small utility library, I came across this interesting pattern in ES modules. Consider this structure: src/ ├ array/ │ ├ chunk.ts │ └ index.ts └ index.ts Inside array/index.ts: export * from "./chunk" Inside src/index.ts: export * from "./array" Now a developer imports the function like this: import { chunk } from "tiny-utils" ❓ Question: From which file is the chunk function actually executed? A) src/index.ts B) array/index.ts C) chunk.ts Drop your answer in the comments 👇 and explain why. This pattern is widely used in libraries to create clean APIs and is often called a barrel export pattern. #javascript #typescript #webdevelopment #nodejs #programming #softwareengineering #devcommunity #coding #frontenddevelopment #backenddevelopment

🚀 JavaScript Fundamentals Series — Part 6 Arrays are how JavaScript stores lists of data. Almost every real application uses arrays. This guide explains: • How arrays work internally • Accessing and updating values • Looping through arrays • Common array mistakes If you understand arrays well, working with data becomes much easier. Full guide 👇 https://lnkd.in/d2b6G9qm #javascript #programming #coding

30 Days JavaScript Challenge: Day 23 ✅ Today’s problem was about building our own version of groupBy() something that’s actually super useful in real projects. The idea was simple: Take an array, run a function on each element, and group elements based on the key that function returns. What I liked about this one is how it makes you think about data transformation not just looping, but structuring data in a cleaner and more usable way. Something like: Group users by id Split numbers based on a condition Organize data for UI rendering All of this becomes much easier once you understand this pattern. Another small step, but feels like I’m getting better at writing cleaner and more practical JavaScript. #javascript #leetcode #webdevelopment #frontenddeveloper #codingchallenge #learninginpublic #developers #programming #buildinpublic

🚀 Day 21 - Poll answer & Explanation function sum() {  var i, l, result = 0;  for (i = 0, l = arguments.length; i < l; i++) {  result += arguments[i];  }  return result; } console.log(sum(1, 2, 3)) // 6 Explanation (simple & clear): - "arguments" is an array-like object holding all passed values. - Loop runs from 0 to arguments.length. - Each value is added to "result". - 1 + 2 + 3 = 6 Key Point: - Works without defining parameters explicitly. - "arguments" is NOT a real array (no map/filter). Output: 6 #JavaScript #JSInterview #FrontendDevelopment #WebDevelopment  #CodingChallenge #JSConcepts #Developers #Programming  #TechInterview #LearnJavaScript #100DaysOfCode #CodeNewbie  #SoftwareDevelopment #CodingTips #JSBasics #DevelopersLife

Starting a new series: JS Under the Hood While learning JavaScript, I realized something — most bugs don’t come from syntax, they come from not understanding how things actually work behind the scenes. So I’m starting this series to break down small but important JavaScript concepts in a simple way. JS Under the Hood #1 JavaScript fact: console is not just for logging. You can: ->group logs (console.group) ->measure performance (console.time) ->differentiate warnings and errors Example: console.time("loop") for (let i = 0; i < 1_000_000; i++) {} console.timeEnd("loop") Why this matters: Debugging and performance tracking becomes much clearer when you use the right console tools. Building this daily alongside my learning. Thank you Hitesh Choudhary sir, Piyush Garg sir, Anirudh Jwala sir for the support #JavaScript #WebDevelopment #CodingJourney #LearnToCode #100DaysOfCode #Developers #Programming #TechCareers

In JavaScript, Reference Data Types say: “If you change me… I will change the every refrences of yours. 😏 Sounds dramatic? Look at this 👇 let a = [1, 2, 3, 4]; let b = a; b.pop(); console.log(a); console.log(b); comment down the output?? #javascript #coding #learntocode #programming #datatypes #learninginpublic

Maps and Sets in JavaScript: A Deep Dive JavaScript provides several ways to store and manage data, with objects and arrays being the most commonly used structures. However, when dealing with unique values or key-value pairs with better effi... Read more → https://lnkd.in/dvP2-4nH #TheCampusCoders #Tech #Developers #Programming #WebDev

🚀 Understanding JavaScript Arrow Functions Arrow functions offer a shorter, cleaner syntax and automatically inherit this from their surrounding scope, making your code easier to read and maintain. Perfect for: • Callbacks • Array methods (map, filter, reduce) • Modern JS development in general 💡 Small syntax, big impact: write cleaner, more efficient code! #JavaScript #WebDevelopment #Coding #Programming #Developers #FrontendDevelopment #FullStackDevelopment