How to Use TransformStreams in JavaScript for Pub/Sub Systems

JavaScript Objects: The Ultimate Guide You'll Actually Use Stop copy-pasting object code you don't understand. Let's build a deep, practical understanding of JavaScript objects together. Read the full article https://lnkd.in/g4d7MukM

JavaScript Objects: The Ultimate Guide You'll Actually Use Stop copy-pasting object code you don't understand. Let's build a deep, practical understanding of JavaScript objects together. Read the full article https://lnkd.in/g4d7MukM

The Rest Operator (...rest) in JavaScript allows us to collect multiple values and store them in a single array or object. It is especially useful when we don't know how many arguments will be passed to a function, or when we want to group remaining properties during object destructuring. Why it’s useful: Makes functions flexible and reusable Helps clean and simplify code Works great with object/array destructuring Commonly used in React to forward extra component props. Simple Reminder: The Rest Operator means: "Collect the remaining values together."

📕 Rethinking async loops in JavaScript 👉🏻 Using `await` within JavaScript loops, specifically `for` loops and `map()` functions, when dealing with asynchronous operations, has some pitfalls. https://lnkd.in/e6TfryrQ

🚀 Day 85/90 – #90DaysOfJavaScript Topic covered: Today I revised how values convert into strings in JavaScript using the toString() method. ✅ toString() converts values to string ✅ Works with numbers, booleans, arrays, objects ✅ Radix support: convert numbers to Binary, Octal, Hex ✅ Arrays → comma-separated string ✅ Objects → default "[object Object]" ✅ JSON.stringify() for readable objects ✅ Custom toString() method inside objects 🧠 Key insight: toString() cannot be used on null or undefined — throws error. 🛠️ Access my GitHub repo for all code and explanations: 🔗 https://lnkd.in/dWUFJZax Let’s learn together! Follow my journey to #MasterJavaScript in 90 days! 🔁 Like, 💬 comment, and 🔗 share if you're learning too. #JavaScript #WebDevelopment #CodingChallenge #Frontend #JavaScriptNotes #MasteringJavaScript #GitHub #LearnInPublic

📘 Chapter 22: Strings – Measuring Length and Extracting Parts in JavaScript In this chapter, we explore how to analyze and extract parts of strings using JavaScript’s built-in methods. Strings are everywhere — from usernames and emails to APIs — so understanding how to measure and slice them is a must for every developer. ✨ Key Concepts Covered: ✅ .length – Find the total number of characters in a string ✅ .slice(start, end) – Extract a specific part of a string ✅ .substring(start, end) – Similar to slice but handles negative values differently ✅ .substr(start, length) – Extracts a portion using start position and length

What is null in JavaScript? "The null value represents the intentional absence of any object value. It is one of JavaScript's primitive values and is treated as falsy for boolean operations. #Description The value null is written with a literal: null. null is not an identifier for a property of the global object, like undefined can be. Instead, null expresses a lack of identification, indicating that a variable points to no object. In APIs, null is often retrieved in a place where an object can be expected but no object is relevant." Source: developer.mozilla.org Source Link: https://lnkd.in/gdTNYjhx

Exploring APIs with JavaScript — My First Hands-on Practice! Today I finally understood how APIs really work! I used JavaScript fetch(), async/await, and error handling to request real data from public APIs. I built two small projects: A Random Dog Image Generator (Dog CEO API) A Random Facts Generator (Useless Facts API) Key concepts I learned today: • What an API actually is • How to call an API using fetch() • Why we use async/await with APIs • How JSON data is received and displayed on the page • Adding event listeners for dynamic updates This small practice boosted my confidence and now APIs feel much simpler than before. More experiments coming soon! #JavaScript #API #WebDevelopment #LearningJourney

✨ Day 10 — How JavaScript Code Works Behind The Scenes! ✨ Today, I went beyond the syntax to understand how JavaScript actually executes code behind the scenes — the hidden engine that makes everything run! ⚙️💻 I began by learning about the Execution Context — the environment where JavaScript code runs — and how it’s created in two key phases: Memory Allocation and Execution. 🧠 Then, I explored how Function Call Execution Contexts are formed and managed using the Call Stack and Heap, helping me visualize how JavaScript handles both primitive values and objects in memory. 📚 I also dived deep into Hoisting, understanding why variables declared with var show up as undefined, and how let & const behave differently due to the Temporal Dead Zone. ⚡ Finally, I wrapped up by studying Function Expressions, Hoisting mechanics, and how the JavaScript Interpreter runs code step by step — truly connecting all the dots behind execution! 🚀 This session gave me a crystal-clear understanding of what happens before a single line of JavaScript runs — the real “magic” behind the language! ✨ #Day10 #JavaScript #WebDevelopment #100DaysOfCode #LearningEveryday #CodingJourney #FrontendDevelopment #Hoisting #ExecutionContext #JSBehindTheScenes