JavaScript Classes & OOP: Learn Modern JavaScript with Classes and Inheritance

Assalam o Alaikum everyone, JavaScript Lesson 30 is here: Pure Functions, Higher-Order Functions, Function Composition & Currying. This lesson focuses on functional programming concepts that help you write cleaner, more reusable, and more predictable JavaScript code. I started with pure functions and explained why they are important: same input, same output, and no side effects. Then I showed the difference between pure and impure functions using real examples like add() and an increment() function that changes external state. After that, I covered higher-order functions, where functions can accept other functions as arguments or return a function as output. I also demonstrated how to create reusable behavior with a function that returns another function, like createGreeter(). Next, I explained function composition using pipe(), which lets you chain transformations together in a clean left-to-right flow. Finally, I covered currying and partial application, showing how one function can be broken into smaller reusable steps. In this lesson, you will learn: • pure vs impure functions • side effects in JavaScript • higher-order functions • returning functions from functions • function composition with pipe() • currying and partial application • arrow function currying This is a very useful lesson for anyone who wants to understand functional programming patterns in JavaScript and write better code in real projects. Watch the lesson: https://lnkd.in/dVyfGvcP #JavaScript #PureFunctions #HigherOrderFunctions #Currying #FunctionComposition #FunctionalProgramming #JavaScriptTutorial #WebDevelopment #FrontendDevelopment #Programming #DeveloperMaroof #LearnJavaScript #JavaScriptConcepts #CleanCode #JavaScriptLessons

I have been recently having fun with Javascript and I recently create about 3hours plus video trying to explain concept like Object Oriented programming(OOP), Async/Await and Promise in Javascript. For the OOP part, I talked about the four features of OOP which: 1. Abstraction 2. Encapsulation 3. Inheritance 4. Polymorphism. I also talked about the three ways someone can implement OOP in Javascript which are through the class, Object.create and through contructor function. I also talked about the fact that Js does not really have true class but a synthetic sugar implementation over constructor function/prototypal inheritance. For the Async part, I talked about asynchronous Javascript, Event loop, Callback Queue, Promises, resolving promises and how to basically promisify an async functions. Nothing Complex just having fun: https://lnkd.in/gBFqVgBe

𝐃𝐚𝐲 𝟗/𝟏𝟓 𝐨𝐟 𝐦𝐲 𝐉𝐚𝐯𝐚𝐒𝐜𝐫𝐢𝐩𝐭 𝐉𝐨𝐮𝐫𝐧𝐞𝐲 🚀 Day 9… and today felt different. For the first time, I saw JavaScript actually changing something on the screen. That moment felt amazing. 💡 What I learned: DOM (Document Object Model) How JavaScript interacts with HTML getElementById() and querySelector() 🧠 What I understood: JavaScript is not just logic… It can control what users see on a webpage. For example: Click a button → text changes That’s JavaScript in action. At first, I was confused about how JS connects with HTML… But when I tried it myself, it finally clicked. 📌 My biggest takeaway: Seeing your code work on screen hits different. This is where things start to feel real. Still learning… Still exploring… See you on Day 10 🚀 #JavaScript #CodingJourney #LearningInPublic #Day9 #DOM #WebDevelopment #Consistency #Programming

Many people do not struggle with JavaScript because of syntax. They struggle because they never really understand how programs work. You can learn functions, objects, and even build small features. But when things get slightly complex, it becomes difficult to trace what is happening and why. That is where the gap lies. Learn JavaScript from Scratch by Sanjay Vyas focuses on building that understanding from the ground up. In this course, you will learn to: • Understand how JavaScript actually works using code visualization techniques • Build strong fundamentals across objects, arrays, functions, and asynchronous behavior • Apply concepts by creating your own web app step by step With 40+ years of teaching experience, the focus is not just on writing code, but on thinking through it. Explore the course here: https://lnkd.in/grNMMXek #JavaScript #Programming #WebDevelopment #LearnToCode 

Callbacks in JavaScript seem simple at first… until you build something real 😅 I recently explored why callbacks exist and what problems they actually solve in async programming. But the interesting part? The problems they introduce… Think of a real flow: Order → Payment → Delivery Now implement it with callbacks… You’ll quickly hit: 🔺 Callback Hell (Pyramid of Doom) 🔗 Function Dependency 🤯 Inversion of Control In this blog, I broke everything down from basics → real-world examples → problems If you’re learning JavaScript deeply, this one will definitely help https://lnkd.in/gdNU466a Drop your feedback in comments....

Today I turned another part of my JavaScript learning into a mind map. After spending time on values, then on program structure, I wanted to go deeper into one of the most important values in JavaScript: functions. The more I study them, the more I see that functions are not just reusable blocks of code. They are closely connected to bindings, scope, lexical environment, closure, recursion, and the call stack. So I sketched this mind map to connect ideas like: - function declarations, function expressions, and arrow functions - local and global bindings - lexical scope - closure - recursion and the call stack What I find interesting is that functions seem simple at first, but the more you look closely, the more depth you discover. This exercise helped me see more clearly that learning JavaScript is not only about understanding syntax. It is also about understanding what really happens when code runs. Still learning, still refining, but this was another very useful step in the journey. #JavaScript #EloquentJavaScript #Programming #WebDevelopment #LearnInPublic

Most people “learn” JavaScript. Few actually understand it. After completing “Namaste JavaScript” by Akshay Saini 🚀, I realised : 👉 Hoisting isn’t magic 👉 Closures aren’t confusing 👉 The Event Loop isn’t scary It’s all about understanding the engine behind the code. This course helped me shift from: ❌ Copying code ➡️ Thinking like a developer Now the real journey begins — building, failing, and improving. If you're learning JavaScript, don’t rush. Depth > speed. #JavaScript #Programming #LearningInPublic #WebDev #AkshaySaini

30 Days JavaScript Challenge: Day 18 ✅ Today’s problem was about implementing a debounce function. The idea is simple but very useful delay the execution of a function, and if it gets called again within that delay, cancel the previous call and restart the timer. This concept is widely used in real-world scenarios like: • search input optimization • reducing unnecessary API calls • handling rapid user events It was a great exercise to understand how timers and function control work together in JavaScript. 18 days in getting more comfortable with concepts that are actually used in real applications. 💻🚀 #javascript #leetcode #webdevelopment #frontenddeveloper #codingchallenge #learninginpublic #developers #programming #buildinpublic

🚀 Unleash the power of JavaScript Scope and Closure to level up your coding game! 🌟 Scope defines the accessibility of variables in JavaScript, while closure allows functions to access variables from their outer scope even after the outer function has finished executing. 🔍 Understanding these concepts is crucial for developers to write efficient and bug-free code by managing variable scope effectively. 🛠️ Let's break it down step by step: 1️⃣ Understand scope 2️⃣ Explore closure 3️⃣ Implement closure in your code with a practical example: [CODE SNIPPET]. Pro tip: Remember to use closures wisely to prevent memory leaks and improve performance. Beware of the common mistake of accidentally creating closures that hold unnecessary references, leading to memory issues. 🛑 What's your favorite use case for closures in your projects? Comment below! 🌐 View my full portfolio and more dev resources at tharindunipun.lk #JavaScript #ScopeAndClosure #CodingTips #Programming #WebDevelopment #TechKnowledge #DeveloperCommunity #LearnToCode #CodeNewbie #TechSkills

#Day15 Mastering Callbacks in JavaScript Today let’s talk on Callbacks a core concept for handling asynchronous operations in JavaScript. At Mentorship for Acceleration for backend track, I explored how callbacks allow functions to execute after tasks like timers, events, or API responses complete. I also saw firsthand why they can lead to “Callback Hell” if not managed well. Key Concepts Practiced: => Basic callback implementation with setTimeout() => Using callbacks with array methods (.map(), .forEach(), .filter()) => Named vs anonymous callback functions => Understanding the limitations of nested callbacks Callbacks have sharpened my understanding of asynchronous programming and prepared me for cleaner patterns like Promises. Progressing steadily! #M4ACELearningChallenge #LearningInPublic #JavaScript