Vijay Shekh’s Post

🚀 What I Learned Today – JavaScript Basics Today I revised some important concepts in JavaScript: 🔹 Loops (for, while, do-while, for...of, for...in) 🔹 Infinite loop and why it should be avoided 🔹 Strings and how they store text 🔹 String properties (length, indexing) 🔹 Template literals & string interpolation 🔹 String methods (toUpperCase, trim, slice, replace, etc.) Also understood that strings are immutable in JavaScript. Small steps every day to become a better developer 💻 #JavaScript #WebDevelopment #LearningInPublic #CodingJourney

🚀 30 Days of JavaScript – Day 16 Starting to build more structured programs using JavaScript. 💡 Today’s Project: Contact Manager This program allows users to: • Add contacts (name & phone) • View stored contacts 🧠 Concepts Used: • functions • arrays of objects • oops • menu-driven logic This helped me understand how to organize code into reusable functions. 🎥 Demo below 👇 Full source code in the First comment. #JavaScript #WebDevelopment #CodingJourney #LearningJavaScript #ProblemSolving

Javascript: Undefined vs null Ever seen undefined and null in JavaScript and felt confused? 🤔 You’re not alone. Many beginners mix them up. But the difference is actually very simple. Here’s the easy way to understand it: • undefined → A variable is declared but no value is assigned yet let name; console.log(name); // undefined • null → A developer intentionally sets an empty value let user = null; • undefined is automatic – JavaScript gives it by default. • null is intentional – The developer sets it manually. • Both mean “no value”, but the reason is different. Simple rule to remember: 👉 undefined = not assigned yet 👉 null = intentionally empty Understanding this small concept can help you avoid many bugs in JavaScript. #JavaScript #WebDevelopment #FrontendDevelopment #ProgrammingTips #LearnJavaScript #CodingForBeginners #SoftwareEngineering #TechEducation #JavaScriptDeveloper #DevCommunity

Day 20 of my JavaScript journey 🚀 Built a Password Generator with advanced features using HTML, CSS, and JavaScript. Features: 🔐 Custom password length (8–20 characters) 🔤 Include/exclude uppercase, lowercase, numbers, and symbols 📋 One-click copy to clipboard 📊 Password strength indicator This project helped me dive deeper into logic building, user input handling, and creating practical tools. 💻 GitHub Repo: https://lnkd.in/g7kFznGK Focused on building projects that are not just functional, but actually useful. 💻 #JavaScript #WebDevelopment #FrontendDeveloper #100DaysOfCode #CodingJourney

just built a digital clock using javascript. sounds simple, but not gonna lie… seeing time update automatically felt cooler than it should have . Finally understanding how javascript actually makes a webpage *do* things instead of just sitting there looking pretty. small project, but big confidence boost. trying to move from “watched tutorial” to “ok wait I can build stuff now”. github link in comments. #buildinpublic #javascript #codingjourney #learning

I ran a small JavaScript experiment today, and it was a good reminder that performance often hides inside simple concepts. I used the same function twice with the same inputs. The first call took noticeable time. The second call returned almost instantly. Nothing changed in the inputs. Nothing changed in the output. The only difference was that the second time, JavaScript didn’t need to do the work again. That’s the beauty of memoization. Instead of recalculating, it remembers the previous result and returns it from cache. What looks like a small optimization in code can make a big difference in how efficiently an application behaves. The deeper I go into JavaScript, the more I realize: the real power is not just in writing code — it’s in understanding how to make code smarter. #JavaScript #WebDevelopment #FrontendDevelopment #Memoization #Closures

🚀 30 Days of JavaScript – Day 12 Can you solve these number puzzles? 🤔 Today I built a small JavaScript program that asks 3 number pattern questions and calculates the final score. 🧠 Concepts Used: conditional statements user input with prompt() variables and score tracking 🎥 Demo below 👇 Full source code in the First comment. #JavaScript #CodingChallenge #ProblemSolving #LearningJavaScript #WebDevelopment

Day 2/100 of JavaScript 🚀 Today’s Topic: "let", "const", "var", hoisting and TDZ. "var", "let", and "const" are used to declare variables, but they differ in scope and initialization behavior - "var" is function-scoped and during the creation phase it gets initialized with "undefined", so it can be accessed before assignment. - "let" and "const" are block-scoped and are registered in memory during creation, but not initialized immediately. This leads to TDZ (Temporal Dead Zone) a phase where the variable exists in memory but remains uninitialized and cannot be accessed. Accessing "let" or "const" variables before initialization results in a ReferenceError. - "const" must be initialized at declaration and cannot be reassigned. - "let" allows reassignment but not redeclaration in the same scope. These differences make "let" and "const" more predictable and safer compared to "var". #Day2 #JavaScript #100DaysOfCode

🔑 Mastering the this keyword in JavaScript! Understanding this can be a game-changer for your JavaScript journey! It can be tricky, but once you get it, your code will be more dynamic and powerful. Here’s a quick breakdown: 🌍 Global Context: In the global scope, this refers to the global object (like window in browsers). 🏠 Object Method: When used inside an object method, this refers to the object itself. 🛠️ Function Context: In regular functions, this defaults to the global object (or undefined in strict mode). 🏃♂️ Arrow Functions: They do not have their own this; they inherit it from the parent scope. 💡 Pro Tip: Use bind(), call(), or apply() to explicitly set the value of this. Follow ABDUL REHMAN ♾️ For More Updates 👍👍 Learn more from w3schools.com , JavaScript Mastery ✨ #JavaScriptTips #WebDevelopment #CodingInsights

🚀 What I Learned Today – JavaScript Arrays Today I explored Arrays in JavaScript and here are the key takeaways 👇 🔹 Arrays are a collection of items 🔹 They are linear (elements stored sequentially) 🔹 Arrays are mutable (can be changed after creation) 📌 Array Indices Positions of elements in an array (starting from 0) 📌 Looping Through Arrays Used to print or access all elements easily 📌 Useful Array Methods ✔️ push() – add element to end ✔️ pop() – remove element from end ✔️ unshift() – add element to start ✔️ shift() – remove element from start ✔️ toString() – convert array to string ✔️ concat() – merge arrays ✔️ slice() – get part of array (no change to original) ✔️ splice() – modify array (add/remove/replace) 💡 Example: slice(start, end) splice(start, deleteCount, newElement) Learning step by step and building strong fundamentals 💪 #JavaScript #WebDevelopment #CodingJourney #FrontendDevelopment #100DaysOfCode)