Mastering JavaScript Functions and Objects with Hitesh Choudhary

Strengthening my JavaScript fundamentals by diving deeper into how the language works behind the scenes. Today I explored some core concepts: • How the this keyword behaves in different contexts • Differences between call(), apply(), and bind() and how they control function context • How apply() works with array arguments and function borrowing • Behaviour of this in arrow functions vs regular functions, including detached scenarios • How the new keyword creates instances using constructor functions • How prototypes enable inheritance and efficient method sharing across objects Understanding these internals makes JavaScript behavior much more predictable and logical. Next step: implementing custom polyfills for map, reduce, and flat to reinforce these concepts through practice. Learning consistently through the Chai aur Code Web Dev Cohort 2026 under the guidance of Hitesh Choudhary Chai Aur Code Piyush Garg Akash Kadlag #javascript #webdevelopment #learninginpublic

🚀 Day 82 of My #100DaysOfCode Challenge Today I learned about a very useful JavaScript feature — Optional Chaining ("?."). When working with deeply nested objects, accessing properties can sometimes cause errors if a value is "undefined" or "null". Optional chaining helps solve this problem by allowing us to safely access nested properties without breaking the code. Example without Optional Chaining const user = { profile: { name: "Tejal" } }; console.log(user.profile.name); If "profile" doesn’t exist, this code would throw an error. Example with Optional Chaining const user = { profile: { name: "Tejal" } }; console.log(user?.profile?.name); Output Tejal If a property doesn't exist, JavaScript simply returns undefined instead of throwing an error. Why this is useful • Prevents runtime errors • Makes code cleaner and shorter • Helpful when working with APIs and complex objects Small modern features like this make JavaScript development much smoother. Continuing to explore deeper concepts and improving step by step. 💻✨ #Day82 #100DaysOfCode #JavaScript #OptionalChaining #WebDevelopment #LearningInPublic

📌 LinkedIn Post Content 🚀 30 Days of JavaScript – Day 7 Continuing my journey of improving JavaScript logical thinking by solving small problems daily. 💡 Today’s Program: Remove Duplicate Numbers from an Array This program takes numbers as input and removes duplicate values to create a list of unique numbers. 🧠 Concepts Used: • Arrays • split() and map() • includes() method • for loop • Conditional logic Example: Input → 1,2,3,2,4,1,5 Output → [1,2,3,4,5] 🎥 Demo below 👇 Full source code in the First comment. #JavaScript #CodingJourney #ProblemSolving #WebDevelopment #LearningJavaScript

Chai Aur Code #Cohort 2026 ☕ Chai aur JavaScript✨ Today's session was a deep dive into some of the most powerful and often misunderstood concepts in JavaScript: 🔹this 🔹call(), apply(), bind() 🔹new keyword 🔷 Prototypes & Polyfills These aren't just abstract ideas. They form the backbone of how JavaScript handles context, object creation, and inheritance. 🔷Key takeaways: 🔹How call() and apply() give explicit control over function context. 🔹 How bind() creates a new function with a permanently bound this. 🔹 What happens under the hood when we use the new keyword. 🔹How the prototype chain enables inheritance in JavaScript. 🔹Why polyfills are essential for backward compatibility and cleaner code. Before this, these topics felt tricky. Now, I can see how they connect to real-world applications and scalable code design. Grateful to Hitesh Choudhary Sir, Piyush Garg Sir, and the amazing team - Jay Kadlag, Akash Kadlag, and Anirudh Jwala Sir - for making these advanced concepts crystal clear with practical examples. JavaScript just got serious today - and I'm excited to keep building on these fundamentals! #webdevelopment #JavaScript #function #chaicode

Today I explored one of the most confusing but fascinating concepts in JavaScript — The Event Loop. JavaScript is single-threaded, but it still handles asynchronous tasks like API calls, timers, and promises smoothly. The magic behind this is the Event Loop. Here’s the simple flow: 1️⃣ Call Stack – Executes synchronous code 2️⃣ Web APIs – Handles async tasks (setTimeout, fetch, DOM events) 3️⃣ Callback Queue / Microtask Queue – Stores callbacks waiting to execute 4️⃣ Event Loop – Moves tasks to the call stack when it’s empty 💡 Example: console.log("Start"); setTimeout(() => { console.log("Timeout"); }, 0); Promise.resolve().then(() => { console.log("Promise"); }); console.log("End"); 🧠 Output: Start End Promise Timeout Why? Because Promises go to the Microtask Queue which runs before the Callback Queue. ✨ Learning this helped me finally understand how JavaScript manages async behavior without multi-threading. Tomorrow I plan to explore another interesting JavaScript concept! Devendra Dhote Ritik Rajput #javascript #webdevelopment #frontenddeveloper #100DaysOfCode #learninginpublic #codingjourney #sheryianscodingschool

✨ 𝗗𝗮𝘆 𝟴 𝗼𝗳 𝗠𝘆 𝗝𝗮𝘃𝗮𝗦𝗰𝗿𝗶𝗽𝘁 𝗝𝗼𝘂𝗿𝗻𝗲𝘆 🚀 Today I explored 𝗝𝗮𝘃𝗮𝗦𝗰𝗿𝗶𝗽𝘁 𝗢𝗯𝗷𝗲𝗰𝘁𝘀 𝗮𝗻𝗱 𝘁𝗵𝗲𝗶𝗿 𝗠𝗲𝗺𝗼𝗿𝘆 𝗠𝗮𝗻𝗮𝗴𝗲𝗺𝗲𝗻𝘁 𝗶𝗻-𝗱𝗲𝗽𝘁𝗵, and learned how objects are actually structured behind the scenes in memory. I discovered that JavaScript objects are stored in the heap, and the variable holds a reference (pointer) in the stack. But what’s more interesting is that internally, objects have different pointers:   • 𝗠𝗮𝗽 𝗣𝗼𝗶𝗻𝘁𝗲𝗿 → points to the object’s hidden class (structure and layout of properties)   • 𝗣𝗿𝗼𝗽𝗲𝗿𝘁𝗶𝗲𝘀 𝗣𝗼𝗶𝗻𝘁𝗲𝗿 → points to where named properties are stored   • 𝗘𝗹𝗲𝗺𝗲𝗻𝘁𝘀 𝗣𝗼𝗶𝗻𝘁𝗲𝗿 → points to indexed elements (used especially in arrays) This explains how JavaScript engines optimize objects for performance and access speed. Understanding these low-level details helps me see JavaScript beyond syntax — it’s helping me understand how things really work under the hood. Building strong fundamentals step by step. #JavaScript #100DaysOfCode #WebDevelopment #LearningJourney #FrontendDevelopment #ComputerScience

🚀 30 Days of JavaScript – Day 6 Continuing my journey to improve my JavaScript logical thinking by building small programs every day. 💡 Today’s Program: Find the Largest Number (User Input) This program allows the user to enter numbers separated by commas and then finds the largest number in the list. 🧠 Concepts Used: • prompt() for user input • split() to convert input into an array • map(Number) to convert strings into numbers • for loop for iteration • Conditional comparison (if statement) 📌 Example Input: 10,25,7,90,30 Output: Largest Number: 90 🎥 Demo below 👇 Full source code in the First comment. #JavaScript #WebDevelopment #CodingJourney #ProblemSolving #LearningJavaScript #30DaysOfCode

🚀 Today’s JavaScript Practice: Merging Two Arrays Using a For Loop Today I practiced how to merge two arrays in JavaScript using a for loop instead of built-in methods. This helped me better understand how array indexing and loops work internally. 🔹 First, I created two arrays with some numbers. 🔹 Then I used a for loop to copy elements from the first array into a new array. 🔹 After that, I used another for loop to add elements of the second array after the first array’s elements. 💻 Example idea: data1 = [10,20,30,40,50] data2 = [60,70,80,90,100] ✅ Result → [10,20,30,40,50,60,70,80,90,100] You can also check my GitHub profile for more practice projects and code. #DSA #JavaScript #WebDevelopment #CodingPractice 😊

🚀 30 Days of JavaScript – Day 4 Continuing my journey to improve JavaScript logical thinking by building small programs every day. 💡 Today’s Program: Vowel Identifier & Replacement This program: i) Takes a name as input ii) Identifies vowels (a, e, i, o, u) iii) Replaces vowels with * iv) Counts the total number of vowels in the name 🧠 Concepts Used: prompt() for user input for loop for iteration toLowerCase() for case handling includes() method Conditional logic (if / else) Example: Input → john Output → j*hn Total Vowels → 1 🎥 Demo below 👇 Full source code in the first comment. #JavaScript #WebDevelopment #CodingJourney #ProblemSolving #LearningJavaScript #30DaysOfCode

🚀 JavaScript Fundamentals Series — Part 8 Objects are one of the most important concepts in JavaScript. Almost everything in JavaScript is built around objects. This guide covers: • What objects really are • Properties and methods • How JavaScript structures data • Why objects are everywhere in JS If you want to truly understand JavaScript, you must understand objects. Full guide 👇 https://lnkd.in/dGHh7weZ #javascript #coding #webdev