Vijay Shekh’s Post

👉 If you're writing modern JavaScript, these 10 underrated features can instantly improve your code 👇 💡 Optional Chaining ("?.") → Stop “cannot read property of undefined” errors 💡 Nullish Coalescing ("??") → Smarter defaults (without breaking "0" or """") 💡 Array.at() → Clean way to access last elements 💡 structuredClone() → Proper deep copy (no hacks) 💡 Promise.any() → First successful API wins 💡 Object.hasOwn() → Safer property checks 💡 replaceAll() → Replace all matches without regex 💡 Top-Level Await → Cleaner async code in modules 💡 Logical Assignment ("||=", "&&=", "??=") → Write less, do more 💡 WeakMap / WeakSet → Memory-efficient data handling 🔥 These aren’t “advanced” features — They’re modern JavaScript essentials in 2026. --- 💬 Curious — Which one are you already using in production? And which one is new for you? --- #JavaScript #WebDevelopment #Frontend #FullStackDeveloper #Coding #SoftwareEngineering #TechJobs

Today I finally understood how JavaScript actually stores data in memory — and it changed the way I look at code. Earlier, I used to just write variables and functions without thinking much about what’s happening behind the scenes. But now it makes a lot more sense: Primitive values (like numbers, strings, booleans) are stored directly in memory Reference types (like arrays and objects) are stored differently — the variable holds a reference, not the actual value That’s why things like this behave unexpectedly sometimes: Copying objects doesn’t create a real copy Changing one reference can affect another Understanding this cleared up a lot of confusion I had while debugging. Still learning, but this felt like a small breakthrough Hitesh Choudhary Piyush Garg Chai Code #JavaScript #WebDevelopment #100DaysOfCode #LearningInPublic

Subject - Common mistake while using fetch in JavaScript Many beginners (including me) try to do this: const data = await fetch('https://lnkd.in/gNBBq58S'); const json = await JSON.stringify(data); 🚫 This is wrong because fetch() returns a Response object, not actual JSON data. ✅ Correct approach: const data = await fetch('https://lnkd.in/gNBBq58S'); const json = await data.json(); ✔️ Lesson: Always use .json() to extract data from the response. Small mistake, but important for real-world projects. #javascript #webdevelopment #frontend #coding #learninpublic

🛡️ Advanced JavaScript — Day 2: Form Validation with Regex Today I built a Form Validation project using JavaScript — and this one was different from anything I'd done before. Not because forms are complex. But because today I used Regex for the first time to validate inputs — and it completely changed how I think about data validation. Here's everything I covered and built today 👇 📌 What is Form Validation? 📌 preventDefault() 📌 Regex — Regular Expressions 🔍 📌 Dynamic Error Messages 📌 isValid Flag Simple pattern. Used everywhere in production code. Form validation isn't just about blocking bad data. It's about respecting the user — giving clear, instant feedback instead of letting them wonder what went wrong. Project done. Concepts understood. Moving forward.... #AdvancedJavaScript #JavaScript #FormValidation #Regex #100DaysOfCode #LearnInPublic #WebDevelopment #Frontend #Programming #CodingJourney #BuildInPublic

#Day5 of JavaScript Series: 🚀 DataTypes in JS: 🔹 What are Data Types? They define the type of data a variable can hold. 🔹 JavaScript has 2 main categories: 👉 1. Primitive Data Types Number → 10, 3.14 String → "Hello", 'JS' Boolean → true / false Undefined → variable declared but not assigned Null → intentional empty value BigInt → large integers Symbol → unique identifiers 👉 2. Non-Primitive (Reference) Data Types Object → {name: "John"} Array → [1, 2, 3] Function → function() {} 🔹 Example: let name = "Deepika"; // String let age = 21; // Number let isStudent = true; // Boolean let skills = ["JS", "React"]; // Array 🔹 Why it matters? ✅ Helps avoid unexpected bugs ✅ Improves code readability ✅ Essential for mastering JavaScript #JavaScript #WebDevelopment #Coding #Frontend #Developer #Day5 #Programming Raviteja T Abdul Rahman 10000 Coders

🚀 Day 30 of My Full Stack Development Journey Today I explored String methods in JavaScript and learned how to manipulate and work with text data effectively ⚡ Here’s what I learned today: 🔹 String Methods – Working with built-in functions 🔹 trim() – Removing extra spaces 🔹 Strings are Immutable – Understanding how strings behave in JS 🔹 toUpperCase() & toLowerCase() – Changing text case 🔹 indexOf() – Finding positions in a string 🔹 Method Chaining – Combining multiple methods 🔹 slice() – Extracting parts of a string 🔹 replace() & repeat() – Modifying and repeating text 🔹 Practiced several questions to strengthen my understanding 💻 It’s interesting to see how powerful JavaScript becomes when working with strings. Step by step, improving my coding skills and logic 🚀 #FullStackJourney #WebDevelopment #JavaScript #LearningInPublic #100DaysOfCode #CodingJourney

Most beginners start JavaScript… but don’t understand variables & data types deeply. They declare variables. Store values. Write basic code. It feels easy — until logic gets complex. Then the real problems start: Confusion in data handling. Unexpected bugs. Weak logic building. Difficulty scaling code. In 2026, JavaScript isn’t about syntax. It’s about building strong logic foundations. This is where it starts: • Understanding var, let, const clearly • Knowing different data types (string, number, boolean, object, array) • Storing and managing data efficiently • Writing clean and predictable logic • Avoiding common beginner mistakes Because strong logic doesn’t come from frameworks — it comes from mastering the basics. Curious — are your fundamentals strong or just “working somehow”? #JavaScript #WebDevelopment #Coding #Programming #FrontendDevelopment #LearnToCode #DeveloperLife #JSBasics

🚀🔥 Mastering JavaScript String Methods & Real-Time Problems 🔥🚀 🚀Today I focused on strengthening my String fundamentals + problem-solving skills 💻🧠 ✨ What I Practiced: 🔹 Clean user input by removing unwanted spaces 🔹 Case-insensitive comparisons (real login scenarios) 🔹 Searching words inside strings 🔹 Extracting specific parts of strings (like usernames, substrings) 🔹 Converting data types (string ↔ number) 🔹 Working with arrays from strings 💡 Real-Time Use Cases I Solved: ✅ Email username extraction ✅ File type validation (.html check) ✅ Password masking using symbols ✅ Replacing spaces for URL-friendly strings ✅ Checking word existence in sentences 🧠 Logic-Based Problems Covered: 🔸 Reverse a string (without built-in methods) 🔸 Check palindrome 🔸 Count vowels in a string 🔸 Find frequency of characters 🔸 First repeating & non-repeating character 🔸 Remove duplicate characters 🔸 Check anagrams 🔸 String compression (aaabbc → a3b2c1) 🔸 Reverse case transformation (hELLO wORLD) 🔥 Key Learnings: ✔️ Strings are immutable (operations return new values) ✔️ Combining multiple methods is powerful ✔️ Logic building is more important than memorizing methods ✔️ Writing generic solutions is crucial for interviews #JavaScript #WebDevelopment #FrontendDeveloper #CodingJourney #ProblemSolving #DSA #LearningInPublic #CareerGrowth #TechJourney

🚀 map() vs. forEach(): Do you know the difference? The Hook: One of the first things we learn in JavaScript is how to loop through arrays. But using the wrong method can lead to "hidden" bugs that are a nightmare to fix. 🛑 🔍 The Simple Difference: ✅ .map() is for Creating. Use it when you want to take an array and turn it into a new one (like doubling prices or changing names). It doesn't touch the original data. ✅ .forEach() is for Doing. Use it when you want to "do something" for each item, like printing a message in the console or saving data to a database. It doesn't give you anything back. 💡 Why should you care? 1. Clean Code: .map() is shorter and easier to read. 2. React Friendly: Modern frameworks love .map() because it creates new data instead of changing the old data (this is called Immutability). 3. Avoid Bugs: When you use .forEach() to build a new list, you have to create an empty array first and "push" items into it. It’s extra work and easy to mess up! ⚡ THE CHALLENGE (Test your knowledge! 🧠) Look at the image below. Most developers get this wrong because they forget how JavaScript handles "missing" returns. What do you think is the output? A) [4, 6] B) [undefined, 4, 6] C) [1, 4, 6] D) Error Write your answer in the comments! I’ll be replying to see who got it right. 👇 #JavaScript #JS #softwareEngineer #CodingTips #LearnToCode #Javascriptcommunity #Programming #CleanCode #CodingTips

Catching bugs at 2:00 PM but they don’t wake me up at 2:00 AM. 🛠️ Moving from #JavaScript to #TypeScript wasn’t just a syntax change; it was a shift in confidence. By defining our data structures upfront, we’ve effectively eliminated the "undefined is not a function" errors that used to haunt our production logs. The Difference: In JS, you pass an object and hope the property exists. In TS, the editor won't even let you save the file until you've handled the possibility of it being missing. Example: // JavaScript: The "Finger-Crossing" Method function getUsername(user) {  return user.profile.name; // Runtime Error if profile is missing! } // TypeScript: The "Contract" Method interface User {  profile?: { name: string }; } function getUsername(user: User) {  return user.profile?.name ?? "Guest"; // Type-safe and explicit } The initial setup takes a few extra minutes, but the hours saved in debugging are immeasurable. Have you made the switch yet? Or are you still team Vanilla? 👇 #WebDevelopment #TypeScript #SoftwareEngineering #Coding