Mastering JavaScript: Challenges and Rewards

Just built a Todo App using Vanilla JavaScript! Key Features: ->Add, edit and delete tasks dynamically ->Reorder tasks with up/down buttons ->Persistent storage using localStorage ->Auto-display of tasks with date & time ->Efficient event handling using event delegation This project helped me strengthen my DOM manipulation, JavaScript logic, and web storage skills. Todo Website: https://lnkd.in/e6y7QmAb Check it out on GitHub: https://lnkd.in/eQjqyHwh #JavaScript #WebDevelopment #Frontend #TodoApp #Coding

🚀 Day 975 of #1000DaysOfCode ✨ WebSockets in JavaScript (Explained Simply) Building real-time features is becoming a common requirement in modern applications. In today’s post, I’ve explained how WebSockets work in JavaScript in a simple and practical way, so you can understand how real-time communication is actually implemented. Instead of making repeated HTTP requests, WebSockets establish a persistent connection between the client and server — allowing data to flow instantly in both directions. This is what powers features like chat apps, live updates, notifications, and collaborative tools. I’ve also covered how you can start using WebSockets in your own projects without overcomplicating things. If you’re building interactive applications, understanding this concept can take your projects to the next level. 👇 Have you ever built something using WebSockets? What was your use case? #Day975 #learningoftheday #1000daysofcodingchallenge #FrontendDevelopment #WebDevelopment #JavaScript #React #CodingCommunity #WebSockets

Have you ever struggled with memory leaks in your JavaScript applications? I've seen it happen to the best of us - a team works on a project, and suddenly the app starts consuming more and more memory, causing it to slow down or even crash. This often happens when we use objects that reference each other, creating a cycle that the garbage collector can't break. A rule of thumb is to use WeakMap and WeakSet to avoid these cycles. However, juniors often overlook the fact that WeakMap keys must be objects, not primitive values. Don't let memory leaks hold you back - use WeakMap and WeakSet to keep your code clean and efficient. Stay ahead of the game and keep learning. #javascript #webdevelopment #weakmap

What is the purpose of bundlers and dev servers in your front-end framework or library 🤔 ? Bundlers 📦: These are the organizers 🗄️ of your code. They take all your individual files (CSS 🎨, JavaScript 📜, etc.) and bundle them into highly optimized files 💎, making your application load faster for users ⚡💨. Dev Servers 🛠️: These are your local testing ground 🏗️. They spin up a local server 🌐 so you can view your application in real time 🕒. Some, like Vite ⚡, even feature “Hot Module Replacement" 🔥🔄, automatically updating your browser with any changes you make in real-time 👨💻👩💻. 🅰️ Angular = ESBuild + Vite ⚛️ React = Rollup + Vite 🟢 Vue = Rollup + Vite Feel free to repost 🔄, and follow for more tips ✨. #angular #bundlers #devservers #react #vue

As a developer, I’ve noticed some small things… but they matter a lot 👨💻 1. Console Errors Even When Feature Works Sometimes our JavaScript/jQuery code works perfectly on UI… but the console still shows errors or warnings. 👉 Real examples: `undefined is not a function` but the feature still runs partially Deprecated jQuery methods showing warnings API error in console but UI shows cached/old data 💡 Lesson: Even if it “works”, ignoring console errors can create bigger issues later. --- 2. Works in Chrome, Breaks in Other Browsers We often test only in Chrome… and everything looks perfect 😄 But in other browsers or app web views, things break. 👉 Real examples: CSS flexbox/layout breaking in Safari New JS features not supported in older browsers Different font or spacing issues across browsers 💡 Lesson: A good developer doesn’t just make it work… They make it work everywhere. --- 🚀 Still learning, but these are things I’m experiencing in real projects. #JavaScript #Frontend #Debugging #LearningInPublic #DeveloperJourney #SoftwareEngineering

JavaScript runs everywhere — your browser, your server, your smart TV. That's not magic. That's the 𝐑𝐮𝐧𝐭𝐢𝐦𝐞 𝐄𝐧𝐯𝐢𝐫𝐨𝐧𝐦𝐞𝐧𝐭. I always assumed JS just... ran. Didn't think about what makes that possible. Turns out, without a runtime — there's nothing. The 𝐉𝐒 𝐄𝐧𝐠𝐢𝐧𝐞 is the heart of it all. No engine, no runtime. No runtime, no execution. 𝐄𝐯𝐞𝐫𝐲 𝐞𝐧𝐯𝐢𝐫𝐨𝐧𝐦𝐞𝐧𝐭 𝐭𝐡𝐚𝐭 𝐫𝐮𝐧𝐬 𝐉𝐚𝐯𝐚𝐒𝐜𝐫𝐢𝐩𝐭 — 𝐛𝐫𝐨𝐰𝐬𝐞𝐫, 𝐍𝐨𝐝𝐞.𝐣𝐬, 𝐚𝐧𝐲𝐭𝐡𝐢𝐧𝐠 — 𝐢𝐬 𝐣𝐮𝐬𝐭 𝐚 𝐫𝐮𝐧𝐭𝐢𝐦𝐞 𝐛𝐮𝐢𝐥𝐭 𝐚𝐫𝐨𝐮𝐧𝐝 𝐚𝐧 𝐞𝐧𝐠𝐢𝐧𝐞. Here's what clicked: → 𝐁𝐫𝐨𝐰𝐬𝐞𝐫 has its own JS Runtime — built-in, ships with every browser → 𝐍𝐨𝐝𝐞.𝐣𝐬 is an open-source runtime that runs JS outside the browser → Both share common API names — but their internal implementation is always different And the governing body behind it all? 𝐄𝐂𝐌𝐀 𝐒𝐜𝐫𝐢𝐩𝐭 — the organisation that defines what JavaScript even is. The first JS engine was built by 𝐁𝐫𝐞𝐧𝐝𝐚𝐧 𝐄𝐢𝐜𝐡 himself (the creator of JavaScript). Today it lives inside Firefox as 𝐒𝐩𝐢𝐝𝐞𝐫𝐌𝐨𝐧𝐤𝐞𝐲. → Save this before you need it. #BuildingInPublic #JavaScript #SoftwareEngineering #DeveloperJourney #LearningInPublic #Programming #TechCommunity #WebDevelopment

🚀 Why React Server Components Are Changing Modern Web Development If you're building React apps in 2026, one concept you should definitely know is React Server Components (RSC). 💡 What are Server Components? React Server Components allow certain components to render directly on the server instead of the browser. This means users receive ready-to-use HTML faster, reducing the amount of JavaScript sent to the client. 💬 Have you tried React Server Components yet? What do you think about them? #React #WebDevelopment #Frontend #NextJS #JavaScript #Programming #SoftwareDevelopment #ReactJS #TechTrends

🚀 Day 1/108 – What is JavaScript? Starting my 108-day journey of learning and sharing JavaScript in public. So, let’s begin with the basics 👇 👉 What is JavaScript? JavaScript is a powerful programming language that makes web pages interactive and dynamic. It allows us to update content, handle user actions, and communicate with servers. 💡 Quick Fact: JavaScript was created by Brendan Eich in 1995 in just 10 days! 🧠 Why is JavaScript important? • It is one of the most popular programming languages • Used in frontend, backend (Node.js), and even mobile apps • Essential for modern web development 💻 Example: console.log("Hello, JavaScript!"); This simple line prints a message in the browser console. 🔥 This is just the beginning — 107 days more to go! If you're also learning JavaScript, let’s grow together 🤝 💬 Did you know this before? #JavaScript #WebDevelopment #108DaysOfCode #LearningInPublic #CodingJourney

most React developers use useCallback wrong. not because they don't understand it. because they were taught the wrong rule. the rule they heard: "wrap functions in useCallback to prevent unnecessary re-renders. the actual rule: useCallback only helps when you pass that function to a child component wrapped in React.memo or as a dependency in useEffect. that's it. useCallback doesn't prevent re-renders of the parent. it just memoizes the function reference so children don't see a "new" function every render. three questions to ask before reaching for useCallback: - is this function passed to a memoized child component? - is this function a dependency in a useEffect? - is this function expensive to recreate? if none of these just write the function normally. the best optimisation is usually the one you don't add. #reactjs #typescript #webdevelopment #buildinpublic #javascript

I Thought This Was Easy ! Date: 9/4/2026 Today, I tried another React.js project: Transfer List. When I saw it for the first time, I realized this is too easy—only a game with array, and state updates. 😎 But? When I tried it, I got stuck ! 🤣 🤣 The first two functionalities—moving all items from the left box to the right box and vice versa—I made easily. 😊 But moving only checked items was the most challenging part of this project.🤔 Disabling buttons based on conditions (most time-consuming). After making this project, what I learned: 👉 Improved logical thinking about states. 👉 I learned why the Double-Bang operator is important. 👉 Strong command of filtering. And from what I know, these are the weak areas where improvement is required: 👉 Controlled Components 👉 I always use useState; I need to practice useReducer more. Github Repo - https://lnkd.in/gK9cqYxm #ReactJS #WebDevelopment #CodingJourney #JavaScript #CodeNewbie